For me:
Soul Calibur - Dreamcast
Great fighting game that really wowed me with its graphics and fun gameplay. Fellow forum member Terry Bogard recommended this to me because he absolutely loves fighting games that have weapons, and I couldn' t agree more! Thanks Terry!
Soul Calibur II - Xbox
Another great fighting game marginally superior to Soul Calibur. Once I got this I couldn' t stop playing. The music isn' t *quite* as nice as the DC version, though. The Xbox version is the one for me due to the High Definition support and really nice Dolby Digital 5.1 soundfield. Spawn is also a great character to play as, although I care nothing for Spawn outside of this game. He' s better than the extra character in the PS2 game from Tekken whose name sounds like a bad sneeze.
Street Fighter Zero 3 - Sega Saturn
Also known as Street Fighter Alpha 3, the Saturn version is regarded as the best version of the game, surpassing the Dreamcast version and the (ug) PlayStation version. Not only does this game utilize the best controller in the world (Saturn pads rock), it also requires the 4MB RAM cart. That' s more RAM than you' d get if you took the RAM from every single modern computer in the world COMBINED!
Unfortunately Sega of America was afraid to release the RAM cart even though Capcom begged them to. Sega was afraid it' d turn into another 32X. Sega was crazy.
X-Men vs Street Fighter - Sega Saturn
The first game to use the 4MB RAM cart, this game let you pick 2 different fighters and switch between them on the fly without any drops in the animation. You could have 2 Juggernauts doing supers on the screen and there would be no flicker or slowdown. I have my difficulty level currently set to " 8" (the highest setting) because I play this so much. Great game. Poor Sega... they rejected Capcom' s love when Capcom was good.
Capcom vs SNK 2: Millionare Fighting - Dreamcast
This was a GREAT game as well, slightly better than Capcom vs SNK 1 (also on Dreamcast). If you have the Total Control 3, you could seemlessly use the Saturn control pads and that made the game a billion times better.