[crovax4444]

*grunch*

Hand 1:

Hero needs to reraise PF to isolate BB. Show him that you ain't getting pushed around

Flop: Call CO's bet, don't 3-bet it, it's excessive

Turn: Nice, now you have a gutshot and the 3 3's as outs. Even possible Ace outs. Calling is good

River: Fold, possible flush completed, you have pair of Ace 8 kicker. His bet on the river means he wants you to call.

Hand 2:

Fold preflop. I like the flop. Good job.

Hand 3: Fold river, everything else was well done.

Edit: On further consideration, I like hand 1's 3-bet. I would still fold at the river.