Hand 1 - I can't put him on many hands that would call a river bet that wouldn't beat you... QQ? Played very passively and would probably bet the river. AQ? Why doesn't he bet this turn? Weird hand... I probably check behind river, but that might be weak.

Hand 2 - Re-raise turn! Since he didn't bet the flop, you have to start building the pot now. I raise it to $15 I think. Up to that point, I'm ok with how you played it... villain is a nit, you're last to act pre-flop, so I think you can just call here for deception purporses. I might lead flop to build the pot, but since you said he usually c-bets, you figured he'd do that for you. Since he didn't, you need to get as much money as possible in on the turn.

Hand 3 - Fold to pre-flop raise. If the table doesn't have a below average PFR% I probably don't even call the BB here. As played I definitely fold the flop even to a maniac. If you really want to play, push.

Hand 4 - Raise to $2 pre-flop. I push over his c/r on the flop. He only has $15 left in his stack so why not gambool? As played, turn push is good.