As I missed about 700 posts while typing that last one up: San Andreas was dull, Vice City was great. Haven't really liked any of the 3D Mortal Kombat games, although the most recent one wasn't half-bad.
Not sure whether I'd go for MK1 or SF2, truthfully. I spent a lot of time with SF2 on the SNES, but also quite a lot with MK1 on the PC (yes, I played it with keyboard controls). I suppose that'd come down to the people with whom I was playing - I knew more people who played MK, but there was a fierce SF2 rivalry between a few of us...