[Bosox]

well i'm no expert, having only played a few thousand hands at 3/6 short, but i'll throw in my two cents for variety. This may not apply to higher games, but 3/6 i found to be pretty passive so you can actually get a lot of bluffing equity of out the fact that there's not overbetting. If you bet the pot size on a hand you normally wouldn't put in so much with, it's a lot scarier because it can mean anything. The fish swim away and leave their money behind. I also think the players are worse - I haven't had to build any pots preflop for drawing hands, they pay me off anyways. My pl bb/100 is 5x my nl, btw. good luck!
sox