I really enjoy playing my Gamecube.  I am an "incredibly aged" 29.   I think the Gamecube is a fine platform for the older gamer. 
I've enjoyed the following games so far.  Rogue Squadron 2: Rogue Leader, Super Monkey Ball, NCAA Football 2003,  Wave Race Blue Storm, Madden 2002,  The Legend of Zelda: The Ocarina of Time and Metroid Prime.  I plan of picking up the new Zelda next week.  I don't have as much time as I used to for games,  but I still get my share of gaming in.  I'm currently still making my way through Metroid Prime and the old Zelda. 
BS.