$500NL, how good/bad are these plays?

Hand 1:
-Villain is 19/10/2.3 over 800ish hands, but at the time of this hand villain had been 3-betting me a LOT. he stopped after I started floating him
-Flat call PF, I'm pretty sure no big hands are in villains range so flop check raise was probably either a FD or some mid pair
-Tried repping AK/KK on turn and river

Cryptologic
No Limit Holdem Ring game
Blinds: $2/$5
5 players
Converter

Stack sizes:
UTG: $489.80
CO: $437.25
Hero: $493
SB: $1082.05
BB: $582.90

Pre-flop: (5 players) Hero is Button with
2 folds, Hero raises to $20, SB calls, BB folds.

Flop: ($45, 2 players)
SB checks, Hero bets $26, SB raises to $77, Hero calls.

Turn: ($199, 2 players)
SB checks, Hero bets $89, SB calls.

River: ($377, 2 players)
SB checks, Hero is all-in $307


Hand 2:
-Haven't played much with this player, ran 23/17 over only 47 hands
-Given that I had no reads, I assumed that his flat calls PF of my BIG 4-bet meant he prob had AA/KK or maybe AK (bad assumptions?)
-should I bet somewhere here?


Cryptologic
No Limit Holdem Ring game
Blinds: $2/$5
6 players
Converter

Stack sizes:
Hero: $889.80
UTG+1: $515
CO: $517
Button: $281
SB: $621.20
BB: $485

Pre-flop: (6 players) Hero is UTG with
Hero raises to $20, UTG+1 folds, CO raises to $67, 3 folds, Hero raises to $180, CO calls.

Flop: ($407, 2 players)
Hero checks, CO checks.

Turn: ($407, 2 players)
Hero checks, CO checks.

River: ($407, 2 players)
Hero checks, CO is all-in $337, Hero folds.

I partly like hand 1. Villains flop c/r could very well be a random bluff or FD. Your turn bet is kind of small, but it sets up the river bet nicely. After he checks I really think he has a missed FD. If you think he folds 88, 99, TT or Kx, I like it, otherwise you can just check behind.

Hand 2: I think you can 4-bet a bit less, like 130. There is room for a small bet somewhere then, to see if you're up against JJ. That's the only hand you beat though, so as played I don't mind folding.

Hand 1: i give up on river but i like the rest.