Super Street Fighter IV: 3D Edition just got released, so I thought now would be a good time to ask this question.
Mine would be SFIII: Third Strike. SSFIV is awesome, too, though. I just preferred Street Fighter III's parry system to SFIV's focus attack system. (I know. What an unprecedented complaint.)
And no, the VS. games do not count.
Oh, and if you don't like Street Fighter, you are neither needed nor wanted in this thread.







