It looks like you need to think about what you're trying to achieve in your betting.

Take that hand, PF raise is good with 1 caller. Got to be happy at that point. You'd be happy with blinds, but you dont really want to get a push called at this point with AQ. Put another way, whos going to call your AI? Probably only hands ahead of yours. The blinds are nice, but are they worth risking your stack when theres still 4 people to act?

When the flop comes, you need to think about what you want to achieve. Its a scary flop. Either your opponent has hit a flush, is on a flush draw, or missed. Before clicking a button you need to consider what happens.

If you bet and he folds, you get a nice pot.
If you bet and he calls, what does that mean you'll do next? It probably means he's on a draw, but could mean he's got his flush or a set.
If you check and he checks behind, what does that mean? He could still be on a draw and taking a free card, or he could have missed.
If you check and he bets, what does that mean?

You need to think how you'll react to those situations.

Me, I c-bet that flop. I want to find out now if I'm winning or losing. 800 to go. The only thing he should call or raise with is a flush (even if he has a set he's got to be worried with that flop), so thats as far as I take this. If he raises I fold, if he calls I check/fold.

In this case your check implies weakness, so he comes in with a min-bet. Wtf does that tell you? Nothing. It could mean he's on a draw and is happy to take it now for cheap. It could mean he hit his flush and wants to appear weak to get more money in. It could be a weak bluff. Hell, it could be middle pair. You're now in a situation where you dont have any information. You follow that up with a call that means you head into the turn without information. When the spade hits, your done. He could have air for all you know, but you're not going to bet that turn. Basically you just gave him 200 chips for no reason.

Have a reason for your actions, and a plan for what happens next.