Let me think.
F-Zero [i want to complete all the difficulties in GP mode - NOT easy.]
Pokemon Colluseum [Actually, I don't think this game will ever touch my Gamecube's disc drive again. Shame it's such an appauling game really.]
RE4 [i'm on the island I think. It's just one of those things I never got back in to.]
Paper Mario [i'm on the very last boss, but I only have two items, and I can't seem to get out of the fooking castle, arrrrgh!!]
Tales of Symphonia [i want to complete it again, that's how awesome it is.]
MP and MP2.
And probably some other games, too, that I've forgotten. However, today I bought 4 games for £20 from Gamestation:
Viewtiful Joe
Starfox Adventures
Splinter Cell Pandora Tomorrow
NFSU2
So I have more to add to my list :P