First - insta add this thread to the digest if you haven't already Stacks.

I'm not going to suggest I'm really qualified to comment, but I'll comment anyway - so take with grain of salt.

Stats:
Disclaimer - I typically play 6max.

3bet % may be low. Or rather, it may be possible to 3bet bluff more often and still do it profitably. Even if the opponents are nitty this is not such a huge concern if they only continue to 3bets with a narrow range. If fold to 3bet % is 75% a 3bet to 3x PFR is breakeven. Of course image counts for a lot, so if you have an image that people will fold to it can be even more profitable. I'm sure you 3bet for value an appropriate amount of the time, but I think you may lose out on 3bet bluffing opportunities.

Steal seems a bit on the low end also (as you yourself said). While it's a perfectly acceptable % if the blinds play back at you a lot, FR should be generally more nitty than 6max, and thus the blinds are more likely to be auto-folding nits. Can always consider varying bet sizes down to 2.5bb for BTN raises if it gets the same folds.

For post flop aggression I like how you are progressively less aggressive on each street. Thumbs up to that. Your overall aggression frequency and aggression factor seem quite moderate. Not quite passive, but I would not automatically assume that it's more optimal than a more aggressive style. It almost seems as if you are playing a moderate form of fit or fold.

My gut feeling is that maybe you do not bluff enough. My other feeling is that you are probably multi-tabling ABC poker and missing thinner edges that way.

Hands:
K9s: You say that steal size is 3.5bb by mistake. I'm going to just assume you mean open size and you would open to 3bb with AA also. One thing I got from SSNLHE is the suggestion that while open size is situation dependent and late position is certainly part of the situation, there are other parts to the situation as well. One is, if the blinds call too much pre and fold too often post flop it may be worth just raising bigger because when you cbet you win a bigger pot. Similarly if they call too much both pre and post flop it may be worth betting bigger because when you hit and take them to value town the pot gets bigger easier. Conversely if the blinds defend against steal attempts by 3betting a lot a lower steal size (maybe down to 2.25-2.5bb) can work better. In this hand, I love the 4bet with ATC due to the dynamic. I do this as well. I steal until they 3bet, then I continue stealing until I'm sure they 3bet light - then I 4bet bluff. And yes, always with a non-premium the first time because the first time has much higher fold equity. I don't particularly like calling.

QQ: Agree with your comments as stated. Solid, but might benefit from a bigger 3bet so as not to school the CO who you don't want in the hand.

AQo: While the 3bet is profitable with ATC as long you don't do it every time and ruin your image, and while I hate seeing a flop against a nit with AQo when OOP - this is not the situation here. If he's opening around 22% then his range is nicely wide and weak and AQo is ahead of it. Also he cbets so much (too often) that I'd probably flat pre and float most flops and try to take it away on the turn. I'm not sure leading the turn is strong enough so I'd maybe try to check/raise the turn. Then if he checks behind I can insta-lead the river for something close to pot size as that is most easily read as a check/raise that failed to occur. On a wet flop I could lead the flop weakly to suggest a drawing hand. If he then raises me he probably has a made hand and I can continue with TPTK, TPGK and strong draws - if he calls I would tend to assume he has a drawing hand and I can punish that by betting blanks hard. Typically a nit is lost post-flop when he ends up there with a hand that is weaker than his normal post-flop range (a stealing hand) and he'll tend to just fire the one automatic cbet and shut down after. It's pretty easy to confuse a nit and get him out of his comfort zone. Nits look for excuses to fold.

JTo: Folding to the 3bet is obvious imo. I could go either way on the iso-raising. Just, if we do raise we need to expect to steal from the MP limper often if we see a flop with him. His limping range is probably weak.

TT: I think this is probably ok, but I'm not as sure that it's good as you seem to be. If he limp-reraises AA, he might also do it with AK. While he could be limping less than AA with the intent to raise or fold depending on the development, when he puts in the 4bet - does he expect to have fold equity or not? And if the BB is a crazy man he will often have a hand worse than yours also. It's probably a correct fold. I did a quick stove of TT vs AA,AKo vs AA-22, AJs+, AQo+ and TT came up with 34% equity. So if UTG takes this line sometimes as a bluff and the BB is a maniac getting it in here preflop doesn't seem to be a huge mistake, if a mistake at all. Especially note that you have a bigger edge with the dead money maniac, and a side pot that you only you can beat him out of. Of course if you shove and the BB folds you're in a bad situation against UTG. I think a fold is fine, but with a maniac that might be willing to stack off light and a side pot with him that only you can win I think it's not a super clear must-fold.

A6o: Raise bigger. He limps too much and he calls too much - punish him by having to call a larger amount so you make the size of his mistake bigger. 5bb is not likely to change his response any. Completely agree with folding to 3bet - A6o not good multiway in 3bet pot. 3bet obviously wants calls (bet sizing tell?)

T8s:
Fold is fine. I don't think I like calling so much. 4bet is probably best if you think BB is quite likely to be squeezing. If he calls the 4bet he is unlikely to have a hand that dominates yours so you will have outs. Only problem with 4betting is that you almost cannot 4bet a size which you can subsequently fold if he shoves. Your minimum bet size is to $28.50, and if SB folds and BB shoves you are looking to call $71.50 to win $131.50, requiring 35.2% equity to make calling mandatory.

99: Is this the best way to extract value from a set? Flop is dry, turn is dry-ish. The opponent is obviously keen to get money in the middle (from his bet size), but what other hands are we calling pre-flop, calling the flop and raising the turn with? I like tanking before calling better because it reads as a weaker range, such as potentially a reluctant ace with a worse kicker.

AKo: Overshove seems a bit excessive. Not saying it's bad, especially if your read is right and he is someone who doesn't want to get pushed around. Any raise is obviously +EV since you have the nuts and the best hand against you will have a maximum of 10 outs once. I would probably do a normal sized raise, but it's entirely possible I'd be missing value and that the oversized shove is better EV.

88: I think this is fine. In hindsight you can always ask yourself what other hands he's making a weak bet on the turn with. In retrospect it's obviously a suck bet, but in context - low straights just became more likely (possible, in fact) and a flush draw came on board and I bet to not price out any draws? River bet could be a bluff with missed spades. I think calling it down is fine, as is thanking him for keeping the pot small.

KQo: I like both folding and 4betting preflop. I don't think calling is wrong as long as you have a plan that can work. OOP doesn't speak in favour of calling. You can only call the 3bet if you plan to steal after the flop. You can't play fit or fold. So how do you steal against this opponent OOP in a 3bet pot? Ok, he floats light and I would guess generally attacks weakness. So we show him some post-flop weakness and check-raise his ass. That's our steal plan. Question is whether we want to do it on the flop or the turn after having led the flop. Since the flop is pretty dry, if this is your first big bluff in recent history I would tend to check-raise the flop simply because it'll have missed his range so often and we have two streets to improve. If I've already pulled a big bluff I'd be more inclined to lead flop and check-raise the turn (all-in) because flop then becomes too obvious to check-raise bluff at. This is obviously not good to do every time, but I would only call pre-flop if I plan in this case to try to steal after the flop.

AA: He could do this with 9s8s tbh. Hero's line is screaming I have A-high pls don't push me off my hand. I'm not sure you can actually bet/fold this river. Even if you bet bigger the natural question would be why you didn't bet a T or J on the turn. Checking behind is probably fine. You will win a huge majority of pots, but almost nothing you beat will call your bet and you may get bluffed off by worse if you reopen the betting.

99: The flop is pretty dry and for dry flops bets down to 1/2 PSB are pretty standard I thought? As in, I don't think his cbet is small and therefore screaming weakness. Rather I think it's larger than it needs to be. Your equity is good if you can get away with calling just one bet to showdown, but with the bet occurring on the flop you can't be sure that there won't be more bets. Calling flop is possibly bad if you do not have a clear plan for how you want to steal from this opponent. Since he's unknown you probably don't have a plan and can just fold the flop.

AJs: Fine with reads. Definitely +EV to iso-raise the dead money in UTG. Problem being the good player - how good is he? Does he know that you are likely iso-raising light and widening his cold calling range as an adjustment? Are you exploitable OOP post-flop? Do you give up too often? Is he making a play at you because you're making a play at a weaker player? Folding here is obviously fine, but you may need to try to find spots where you can play back at the good player so he doesn't fleece you.

QQ: His donk bet size is odd. The flop is pretty wet - you could have both straight and flush draws and yet he bets only slightly more than 1/2 pot. As villain I might bet as much as $6 if I decided to bet (probably settling on $5.5). Because the flop is wet I don't feel good about raising the flop - it's too likely to be read as a drawing hand. Better possibly to float and bet the turn if checked to. This just only really works if he's going to fold a weak ace - and since we don't know him, we don' know if he will. We could try to call and try to check it down to showdown, but the question is if the opponent will let us. I don't hate folding at all. As the saying goes: In small pots, when in doubt - fold.

86s: Fine for me. Wasn't sure about the flop bet size. With a flop that wet and multiway bet size can go as high as pot sized and betting smaller kind of gives away that you have a drawing hand. If the opponents are not observant this is fine. Rest is super fine.

Q9s: Fine for me. Limping after is fine as long as BB isn't the type to raise to pick up the dead money. Especially good because it is becoming a 4-way flop. Rest is good.

42s: Bit loose from the position, but dynamic/game flow/image can make that perfectly fine. Flop does hit your range hard and it's a good cbet if your opponents are good enough to fold weak aces and similar. I would not be surprised if there is at least one weak ace among your opponents.

AKo: Agree on the missed value part. This opponent could be bad enough that it's good to stack off with TPTK, but that might be marginal. Two streets I definitely think is in it. I think the flop is superdry and your bet size unnecessarily big unless he's so big a station that he doesn't care about odds and outs. It could be WA/WB and checking behind might be a good way to get two streets of value from worse hands. As played either turn or river need to be bet. I would lean towards taking that bet on the river. With big bet sizes I'd probably prefer check flop and bet turn and river. $6 + $16 = $22. With smaller bet sizes I could imagine some 1/2 PSBs on every street. $4 + $8 + $16 = $28.

ATo: Good. I don't like being OOP multiway - it almost reduces me to fit or fold and I would consider just raising here to isolate, but playing it to a cheap flop is also very effective. Timing tell and the right card coming on turn makes the turn bet obviously best. Not just because you could have a king, but also because you pick up the gutshot to fall back on if called, so you need less folds to be profitable.

TT: I agree that his weak bet size says that it's a draw that wants to draw cheaply. It might not actually be, but that's what it represents. A pot sized bet would be to $17 so the bet is actually slightly below pot size, but I'd agree that it's still too big. Raise to $13 is effectively a $10 bet into a pot of $14 - that's a pretty good size. Important thing about sets vs drawing hands is to remember that sets are also drawing hands. Even if he makes his whatever on the turn you're not without outs - so you don't have to completely squash his odds.