Well you have to be able to defend. A pro-active defense is the best defence, though. For example, Feng has 3 different kinds of parry\'s.
I\'m just saying that the game is a lot faster paced than, say, Tekken Tag, and waiting for your opponent to make the next move (unless you\'re very skilled) is suicide. If you see even the slightest opening to attack, you simply have to take it.