UTG is 20-12 type, 3-bets 3%, cbets 65%, folds to cbet 70% - that type of player who has some basics but plays too weak-loose and has zero positional awareness pre-flop.
MP2 is 29-9. Doesn't fold many flops. River flush draw hit on a paired board, check behind with my under-repped straight, or bet-fold?

Full Tilt No-Limit Hold'em, $1.00 BB (8 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

CO ($148.40)
Hero (Button) ($186.65)
SB ($115.85)
BB ($100)
UTG ($90)
UTG+1 ($233.80)
MP1 ($130.80)
MP2 ($103.30)

Preflop: Hero is Button with J, Q
UTG bets $2.50, 2 folds, MP2 calls $2.50, 1 fold, Hero calls $2.50, 2 folds

Flop: ($9) 10, 8, A (3 players)
UTG checks, MP2 checks, Hero bets $5, UTG calls $5, MP2 calls $5

Turn: ($24) 10 (3 players)
UTG checks, MP2 checks, Hero checks

River: ($24) 9 (3 players)
UTG checks, MP2 checks, hero has to decide