I have preatty much every poker site
i can find installed on my computer but mostly just play Full Tilt Poker
,PokerStars and everest and i find a huge diffrence in play from ft,PokerStars to everest.
The play there most of the time super aggresive reckless preflop and very passive postflop,i feel like a play alot more TAG on everest and it haves paid of so far(just ordered my second check there since i started playing a month ago,btw the checks there take forever.standard waiting time is 3-6weeks).
So my addivce is the same old .... Tighten the Fu** up when u get to table that is full of these maniacs and punish them hard when u have a hand.
I find it very strange that "playing styles" change from one site to another.