1. Super Smash Bros. Melee
This is pretty self explanitory. It had the longest life span of any game on the entire system.
2. Metroid Prime
I reviewed it for Cube-Europe:
http://www.n-europe.com/review.php?rid=20
3. The Legend of Zelda: Wind Waker
I was skeptical at first when this was changed to cel-shading, but it just enhanced all of the emotions and settings in the game. I thought it was a tad bit too easy, but everything else was superb.
4. Eternal Darkness: Sanity's Requiem
Great story and great gameplay. And the sanity effects where just astounding.
5. Skies of Arcadia Legends
I just happened to stumble upon this game while at EB and had no expectations whatsoever. The story and characters pulled me in and I loved it. Well, I loved it up to the point that my disc stopped working.
6. F-Zero GX
A damn good racer with break-neck speeds and awesome visuals.
7. Paper Mario: The Thousand Year Door
I started playing this game at my friend's house last summer and let me say, its completely addicting and very clever.
8. Killer 7
This opinion is mainly based on the the story and style, because the gameplay was a bit lacking. All I have to say is that Suda is an amazing story teller.
9. Metal Arms: Glitch in the System
I thought this was a sleeper hit. Glitch had so many weapons and so many ways to kill the bad guys.
10. Mario Golf: Toadstool Tour
I reviewed this too:
http://www.n-europe.com/review.php?rid=86
^I hyped it up way too much though, should be a high 8