Fool me once...

Villain is 43/3/1.2 over a little under 50 hands. No specific reads. Should I have 3-bet the flop? Checked behind on the turn? What do I do on the river?

PokerStars 3/6 Hold'em (6 handed) FTR converter on zerodivide.cx

Preflop: Hero is MP with Q[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, SB calls, BB calls.

Flop: (6 SB) T[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets</font>, SB calls, <font color="#CC3333">BB raises</font>, Hero calls, SB folds.

Turn: (5.50 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">BB raises</font>, Hero calls.

River: (9.50 BB) K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero??