Mario, Donkey Kong, Mr Driller, Animal Crossing, Resident Evil, PN03, Super Smash Brothers: Melee World of Warcraft, Another Code.. It's a long list :tired2:
Favourites are all the Nintendo titles (Zelda, Mario, Donkey Kong, etc). In fact the only non-Nintendo title in that list is World of Warcraft lol.
Mario Kart Double Dash is quite probably the best fun you will ever have in a videogame if you play co-op. In fact, it definitely is. Oooh, although Legend of Zelda; The Four Swords on Gameboy is also a winner.