Villain has only limped and called so far on all streets except on the river on a couple of occasions. Even when he flopped trip 5's earlier on, he did not bet on the flop or turn, only on the river. I think he qualifies as loose passive. My image was tight, since this is only the second hand I played out of 20.

Full Tilt No-Limit Hold'em, $0.02 BB (8 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

saw flop | saw showdown

SB ($7.65)
BB ($1.76)
Villain (UTG) ($2.07)
Hero (UTG+1) ($1.97)
MP1 ($0.40)
MP2 ($0.22)
CO ($0.80)
Button ($0.65)

Preflop: Hero is UTG+1 with K, A
Villain calls $0.02, Hero bets $0.10, 6 folds, Villain calls $0.08

Flop: ($0.25) 8, A, 8 (2 players)
Villain bets $0.16, Hero raises to $0.45, Villain calls $0.29

Turn: ($1.15) J (2 players)
Villain bets $0.40

Ranges for villain:
- preflop it is really wide, I would say any pair, any ace, K8+, QT+, JT, any suited connector > 56s. High PP's are unlikely in my mind because he would have raised it preflop(?)
- on the flop, I'd put him on Ax, and maybe any hand holding an 8, but then why would he lead into me instead of waiting for me to bet? Can't see him on a pocket pair, because why would he lead into me with an ace on the board. + he did no raise preflop.
- on the turn, I am really starting to fear an 8, but Ax still possible (including AJ of course).

What's your line here?