There is no golden way to play poker, which should always be used. Im a firm believer in mixing it up. If you know your opponent, and know whether he favours one type of play over another, you have an advantage. This also goes the other way around.
a hint, though, if everyone at table is playing extremely aggressively, then let them duke it out and just sit back and relax, while if noone is betting on anything, start coming out guns blazing for some good pot stealing.
/dydig