Metroid Prime: Echoes, as good as the mood is the game all the dimension swapping gets tiresome, I just quit playing 6 hours in and have not resumed.
FZERO:GX, the story mode is just too hard. You can still race normally and in my opinion its quite a good party game.
TLoZ: Majoras Mask, I got this collectors edition since I never had a N64, I finished Ocarina but this games save system frustrates me too much too enjoy all thats good.
Resident Evil 4, well i finished the original game but it took me months since the mood is so heavy and could not endure more than one typewriter to the next. I never finished Adas quest, felt kinda like the same game again... I´ll probably get the Wii-version when I get a Wii.