This is kindof tough for me. The first console I ever remember owning was an SNES (but for some reason we didn't have ANY Mario games) and I remember it being really fun. Something happened to the console, though, and it didn't work for very long and eventually ceased to function altogether so we replaced it a Sega Genesis until I discovered PC/playstation gaming.

I'd say based on my experience, I am partial to Sega and Sonic.