I was always a Sonic man, though only the Megadrive (Genesis) games and some Master System games, but I never really got into the 3D ones. Sonic 1, 2, 3 and K were the best ones and I still love playing them. Sonic 3D was ok though nothing special and IMO Sonic Spinball sucked. I'm thinking of buying the mega Collection for the PS2 so as to save plugging in my Megadrive in each time. Sadly, it doesnt include Sonic CD, which I can't play now that I have Windows XP.
I still have my old games aswell, such as Streets Of Rage 1 and 2, Golden Axe, Paperboy, World Of Illusions, Revenge of Shinobi, Columns and Vurtua Fighter 2 (Not as good as the Saturn version obviously!)
Since then I bought a Playstation and my brother has a PS2 but I suppose I gradually lost interest in video games and if I ever play any, it's usually only the old ones on emulators etc.
The only new games that I play nowadays are the GTA series and Metal Gear Solid.