I bought Gamecube for the controller. Yes, that's right, I generally buy my systems based on the comfort and style of the controller. At the time, there was only the PS2, which as everyone knows, has a hideously weak controller, and the Xbox which at the time was only being sold with that massive Xbox controller that was too big and weird for my hands. I thought it would be the best because it had better graphics than PS2 and yet was cheaper than Xbox.
I got WaveRace which was pretty and difficult, but after a while, I was like, what's the point in this game? Then, my friend brought over a copy of SSBM and I was hooked. It was funny, he had been playing it for a few weeks and within an hour, I was totally killing him with Fox. I also got this game called Cell Damage, which was a slightly more mature cel-shaded MarioKart-esque game that was actually really fun. I also loved SSX: Tricky, but after the Controller-S came out for Xbox and I played SSX on my cousin's Xbox, as well as a few other games, I sold my GC for Xbox and never looked back. Since most of the games I like are multi-platform, I'm glad I got the Xbox because it always had the best graphics, sound, online multiplayer, etc.
Wii will definetly be soooo much better than the GC and all the good GC games I missed, I can now play on Wii for less money.