For me...

PS1: Spyro
3DO: Immercenary
SNES: Super Mario World
Genesis: Contra: Hard Corps
N64: Mario Golf
PSP: Hot Shots Golf: Open Tee
Xbox: Unreal II
NES: Final Fantasy
GBA: Super Mario Land 2
GC: Animal Crossing

the other systems (PS2, DC, Saturn, 32X, CD, Master System, Jaguar, Game Gear, Game Boy Pocket, Lynx either are wmoty or they havent been playing in so long that I dont even know whats in them)