I'm 23, and have had a GameCube since it launched in 2001. I have the following games on it: Luigi's Mansion, NBA 2K2, Eternal Darkness, Pikmin, Super Mario Sunshine, NBA Street, Beach Spikers, Resident Evil, Zelda: WW, NCAA Football, Madden 2003, SSX Tricky, Super Smash Bros. Melee, Tony Hawk Pro Skater 3, and the bonus OOT disk. The only upcoming GCN game that I'm psyched about is MGS: TS, though I am very curious about the new Bond: EON as well. Not as interested in Mario Kart: DD nor in the recent SCII edition (still enjoy the original on my DC). For what its worth, I also own a PlayStation 2 (yes, yes, I know, the machine of the dark side) -- but really, got it for the games I wanted to play.
Right now, I'm playing Zelda: WW and Virtua Fighter 4: EVO. Both stellar in their own ways.