I feel like I'm not aggressive enough after the flop so I've been trying to make thinner value bets lately. What do people think about this one? Villain seems loose and donkish. His stats are 30/3 over something like 30 hands. He sat down at the table with some amount like $126.49 and doubled up with AA vs KK, in other words the AA hand is the only time he's raised pre-flop.

PokerStars No-Limit Hold'em, $2 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($257.20)
Hero ($313.90)
UTG ($196.70)
MP ($200.60)
Button ($258.75)

Preflop: Hero is BB with 8, 3.
UTG calls $2, 3 folds, Hero checks.

Flop: ($5) 2, 5, 8 (2 players)
Hero bets $4, UTG calls $4.

Turn: ($13) T (2 players)
Hero bets $9, UTG calls $9.

River: ($31) 4 (2 players)
Hero bets $22