Legend of Zelda: Orcarina of Time is by far the best game I have ever played.
Legend of Zelda: The Wind Waker is IMO the best game on the Gamecube right now.
Super Smash Bros Melee is the best fighting/multiplayer game I have ever played, with the huge bonus of it being Nintendo's tribute to itself.
Advance Wars 2 is the best turn-based strategy game I have ever played, it makes all other turn-based strategy games (except maybe chess) look like crap
Super Mario World 2: Yoshi's Island is my favorite platformer/Mario game.
Rise of Nations is the best PC game I have ever played... yeah.
Goldeneye is the best FPS I have ever played, as well as being the best liscenced game I have ever played.
Super Mario Kart was the best racing game I have ever played, hopefully the new Mario Kart coming for the Gamecube will be just as good.
Metroid Fusion was my favorite Metroid game... what would that fit in? Side-scrolling 3rd person shooter?
Soul Calibur 2 is my favorite weapon-based one-on-one 3-D fighting game. (So I'm bored, sue me
)
I'll admit that Pokemon was the most addicting game I played.
And... at the very,
very bottom of the ladder, the game with the best community is Civ because of CFC