What about Street Fighter III? If you like SFII you will love Street Fighter III! I got it for Dreamcast, but PS2 version is on some compilation, too... best one IMO is Street Fighter III: The Third Strike. Yes, they did make three versions of Street Fighter III. Just as you would expect from Capcom.
I always thought the characters off this were just really naff... I mean the big boss was a big guy with small pants... ... it just didnt feel too good to play either... The best SF style games were either Capcom vs SNK 2, or Street Fighter Alpha 3.... damnit, Dan rocks! >
...On the RPG front, I'd have to recommend Fallout 1 or 2 (1 for less bugs IMO), ... probably the most fun RPG classics I've tried (on the PC!)