I bought a gamecube a year after the newer consoles hit the market, and oh man Skies of Arcadia was the main reason why.

I have that game, Mario Sunshine, Metriod Prime, Star Fox Adventures, Wind Waker, Eternal Darkness, Twin Snakes, and a few others.

My favorite game is a tie between Skies of Arcadia and Eternal Darkness: Sanity's Requiem. With Star Fox Adventures a close second.