Well it all depends on your taste in games,
There is quite a selection out there.
Maybe you could give us a clue as to what genre of game your looking for,
Shooter, role play or adventure.
If i had to recommend a few games heres my top 5,
1, The Legend of Zelda Twilight Princess.
2, Sonic and the Secret Rings.
4, Metroid Prime 3: Corruption.
5, Soulcalibur Legends.
Yeh i know, no Mario, as i feel the Mario games now are just rehashes of the older Mario games.