SNES: A Link to the Past, Star Fox, Donkey Kong Country
Gameboy: Link's Awakening, Tetris
N64: Ocarnia of Time, Star Fox 64, Shadows of the Empire, Goldeneye (would say Perfect Dark, but GE had much better replay value in single player)
Gamecube: Never played it. I was excited about it for the new Zelda game (WW), but after I saw how it looked I lost most my interest, then once I saw it played I lost all the rest of my interest.
DS: Never played it.
Wii: Never played it. But I am interested in trying out Twilight Princess. Probably I will just buy a used Gamecube and get the GC version.