Ah, Gamecube. I loved it to death even while the majority hated it.
Super Smash Bros Melee? 150+ hours baby!
Metroid Prime? About 30-35 hours
Metroid Prime 2? About 40 hours
F-Zero GX? 20-25 hours
Tales of Symphonia? Oh, god. 200+ hours
TimeSplitters 3? 30 hours easily
Fire Emblem 9? Around 25-30 hours
Mario Kart DD? Eh, only about 7-9 hours
Super Mario Sunshine? 15-20 hours
There are more games I've spent a good bit of time with but I'll stop at that. I thought Metroid Prime, SSBM, and Tales of Symphonia are some of the best games on the Cube and perhaps last gen.