Villian is 16/12... a little over 200 hands. My reasons for calling/slow-playing are:

1) Villian is aggressive on turn and river, but plays a passive flop. He will lay a hand down a marginal hand to aggression.
2) I have position.
3) I can extract from his Qx and missed draws.

My bigger problem is understanding his river bet size. Does he have the goods with this borderline absurd river bet?

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

BB ($16.05)
UTG ($29.40)
UTG+1 ($25.25)
Hero (MP1) ($30.20)
MP2 ($22.90)
MP3 ($7)
CO ($6.65)
Button ($30.25)
SB ($34.70)

Preflop: Hero is MP1 with 8, 8
UTG calls $0.25, 1 fold, Hero bets $1.25, 6 folds, UTG calls $1

Flop: ($2.85) Q, J, 3 (2 players)
UTG checks, Hero checks

Turn: ($2.85) 8 (2 players)
UTG bets $1.75, Hero calls $1.75....SHOULD HAVE RAISED!

River: ($6.35) 9 (2 players)
UTG bets $6.25, Hero???