Hand1. Villain just sat down (hence me being short). I have 30 hands of stats and he's 35/15/3.5 over that.

Full Tilt No-Limit Hold'em, $2 BB (6 handed) Converter Tool from (Format: Bet The Pot)

UTG ($63)
MP ($95.65)
CO ($129.30)
Button ($192)
Hero ($159.70)
BB ($75.75)

Preflop: Hero is SB with , .
1 fold, CO calls $2, Button raises to $8, Hero raises to $29, 2 folds, Button calls $20.

Flop: ($61) , , (3 players)
Hero bets $48, Button raises to $164 (All-In)

Half my stacks already in, $84 to me to call for $240. Easy call?

Hand 2. Villain is totally unknown before this session. This is his first hand:

Full Tilt No-Limit Hold'em, $2 BB (3 handed)
BB ($200)
Button ($174.10)
Hero ($471.15)

Preflop: Hero is SB with , .
1 fold, Hero raises to $7, BB calls $4.

Flop: ($13) , , (2 players)
Hero bets $8, BB calls $8.

Turn: ($29) (2 players)
Hero checks, BB checks.

River: ($29) (2 players)
Hero bets $18, BB calls $18.

Final Pot: $65

Villain shows [9d] and said something about mis-reading his hand.

Very next hand:

SB ($168)
BB ($174.10)
Hero ($502.15)

Preflop: Hero is Button with , .
Hero raises to $7, SB calls $6, 1 fold.

Flop: ($16) , , (2 players)
SB checks, Hero bets $14, SB calls $14.

Turn: ($44) (2 players)
SB checks, Hero bets $34, SB raises to $147 (All-In)

Apply the 'Check-raised on the turn means one pair is no good' rule?

hand one is an insta fold. yes, you have half your stack in there, but that hardly qualifies as pot commited.
having to risk $84 to win $240 means you're getting 3:1. do you think you're the favorite here more often than 1 out of every 3 times? i sincerely doubt it. this is a major -EV call.

hand 2: i don't like this. I think you're flop and turn play are fine, but why are you betting $18 on the river? the CB is fine, and the pot control turn check is fine.

Yes, he might call you without a heart hoping to split the pot, but i think you're better served checking the river to him and calling a small bet if you think you're holding the best hand here. I'd just much rather give my opponent the chance to bluff here. You're holding a very mediocore holding, and i just don't see the point in betting here.

hand 3: ugly ugly spot. this really looks like 89... but this is a 3 handed game. with no read i'm going to fold here and look for a better spot. but if i've seen this guy making plays like this on previous hands when we're playing short handed, i'm calling here. This is a very very read dependant spot. given that we have no info on villain, i'm folding this.