Opponent is 34/27 over ~20 hands and appears to be the table action. He's very loose and aggressive. Figure his button raise is at least 40% of his hands.

BB is unknown but hasn't really drawn attention to himself.

$1/$2 No Limit Holdem
PokerStars
6 players
Converted at weaktight.com

Stacks:
UTG ($457.55)
UTG+1 ($145.50)
CO ($129.15)
BTN ($146.00)
Hero ($201.65)
BB ($306.05)

Pre-flop: ($3, 6 players) Hero is SB
3 folds, BTN raises to $6, Hero ???