Hi first time posting HH, so go easy on me.

Please reply with some reasoning behind your answers.
Villian is a solid winning reg running at 24/19. Very competent post flop, good at hand reading etc. Actually one of the better, non-spewing regs at 400NL. So far no real aggressive dynamics during this session.
My image is pretty loose but inline, stealing lots of small pots.
Full Tilt, $2/$4 NL Hold'em Cash Game, 5 Players
LeggoPoker.com -
Hand History Converter
Hero (SB): $893
BB: $669.20
UTG: $811.25
CO: $643.50
BTN: $1,259.40
Pre-Flop: T

9

dealt to Hero (SB)
3 folds,
Hero raises to $12, BB calls $8
Flop: ($24) 3

4

T

(2 Players)
Hero bets $20, BB calls $20
Turn: ($64) 5

(2 Players)
Hero checks, BB checks
River: ($64) J

(2 Players)
Hero bets $36,
BB raises to $124
Obv, preflop and flop are standard, however some points for discussion are:
1) Opinions on the turn check? I thought villian is capable of floating this dry flop a lot, hence will be betting turn when check to. I'd be happily calling turn then folding most rivers, as he probably won't try to barrel me off my hand when it's that faced up.
2) My river half pot bet is basically for thin value. He's betting all stronger Tens on the turn and I don't expect to get raised here often. If you were betting this river at all (if not, please explain reasoning), what bet size would you bet and why?
3) Now he raises river, which is a spot I didn't expect to come up. What's he repping? How often is a call good? What about a raise as bluff? Sizing? What can I rep?
p.s never knew it takes this much effort to post HH. I guess I'll get better at it with time.