2 hands from today

Both against unknowns early on with no previous hands.

Not sure I like calling down here that much given my equity against any heart isn't great though I think he can can have AQ/AJ sometimes or just the Kh and thinks I'm full of it. Called river mainly due to the pot odds.

PokerStars No-Limit Hold'em, $0.10 BB (6 handed) - PokerStars Converter Tool from FlopTurnRiver.com

SB ($11.28)
BB ($19.08)
UTG ($17.66)
Hero (MP) ($10.81)
CO ($11.10)
Button ($13.04)

Preflop: Hero is MP with K:diamond:, A:spade:
1 fold, Hero bets $0.35, 1 fold, Button calls $0.35, 2 folds

Flop: ($0.85) 9:heart:, A:heart:, 5:heart: (2 players)
Hero bets $0.65, Button raises to $1.60, Hero calls $0.95

Turn: ($4.05) 10:diamond: (2 players)
Hero checks, Button bets $2.90, Hero calls $2.90

River: ($9.85) 6:spade: (2 players)
Hero checks, Button bets $2.75, Hero calls $2.75

Total pot: $15.35 | Rake: $0.69

Everything normal up to the river. He waited about 5 seconds then bet. I'm not sure he would call the flop with hands like QT/KT, maybe some of the time. He could have AT/JT, unlikely to have AJ/55. I'm just struggling to see him lead with AQ or whatever here. Pot odds are great though.

PokerStars No-Limit Hold'em, $0.10 BB (6 handed) - PokerStars Converter Tool from FlopTurnRiver.com

UTG ($9.53)
MP ($8.64)
Hero (CO) ($10)
Button ($9.60)
SB ($13.84)
BB ($11.31)

Preflop: Hero is CO with A:heart:, K:diamond:
1 fold, MP calls $0.10, Hero bets $0.50, 1 fold, SB calls $0.45, 2 folds

Flop: ($1.20) J:spade:, A:diamond:, 5:club: (2 players)
SB checks, Hero bets $0.90, SB calls $0.90

Turn: ($3) K:spade: (2 players)
SB checks, Hero bets $2.30, SB calls $2.30

River: ($7.60) Q:club: (2 players)
SB bets $2, Hero folds

Total pot: $7.60 | Rake: $0.34

h1: fold flop
h2: meeeehhhhhh call river.

H1 fold flop, who cares if he's exploiting you, it's a shittty board And not one to play a big pot on As played its proll fine given his sizing your almost never behind.
H2 prolly cry call he can certainly have 2 pair and for the price I think it likely

h1: calling flop seems bad because you'll be playing the turn and river oop
h2: raising looks too thin and not folding so call i guess

hand 1 i probably fold flop for factors you mentioned. the 2 of hearts has reasonable equity against us and we are crushed by anything he raises for value. plus we are OOP so we end up either putting in bets which we are going to fold 100% on later streets, aka burning money, or getting in reaaaally marginal bluff-catching spots without reads.

hand 2 looks like a call given his sizing. fish can do this with all kinds of 1 and 2 pair hands. we don't have to be good very often etc.