hmm...let's see...

1. Paper Mario: THe Thousand Year Door
2. Tales of Symphonia
3. Legend of Zelda: The Wind Waker
4. Super Smash Bros. Melee
5. Metroid Prime
6. Luigi's Mansion
7. Mario Kart: Double Dash
8. Super Mario Sunshine
9. Viewtiful Joe
10. Need for Speed Underground 2

And those are the games I've played...

1. Legend of Zelda: Collector's Edition
2. Mario Kart: Double Dash!!
3. Paper Mario: The Thousand-Year Door
4. Super Smash Brothers Melee
5. Legend of Zelda: Wind Waker
6. Super Mario Sunshine
7. Mario Party 6
8. Donkey Kong: Jungle Beat
9. Mario Party 7
10. Shrek's Super Party (not a joke)

1:wind waker
2:tales of symphonia
3:pikmin 1 & 2
4:metroid prime (series)
5:SSB:melee
6:RE4
7:baten kaitos
8:soul calibur 2
9:Mario Kart DD
10:sonic adventure 2: battle(way under rated)

1. Pikmin
2. Paper Mario TTYD
3.Star Fox assult
4.Super smash melee
5.Zelda Wind waker

I mostly played underrated gems so if I go any furter I'll get flamed at

1. Resident Evil 4
2. The Legend of Zelda: The Wind Waker
3. Killer 7
4. Ikaruga
5. Viewtiful Joe
6. Fight Night Round 2
7. Eternal Darkness: Sanity's Requiem
8. Metroid Prime
9. WWE Day of Reckoning 2
10. X-Men Legends

sorry no order( i never had 1 favorite in anything)

windwaker

zelda collector's edditon

FE: Raidiant dawn, or path of raidiance keep messing up which is which

SSBM

MP1

MP2

strafox adventures

sonic adventure battle 2

Prince of persia (2): warrior within

and finally mario sunshine


sorry for all mistakes, it's late here, sleep surrounds me

Hmmm...

1 - Zelda: Twilight Princess

2 - Resident Evil 4

3 - Metroid Prime

4 - Super Smash Bros Melee

5 - Eternal Darkness

6 - Resident Evil

7 - Soul Calibur 2

8 - F-Zero GX

9 - Skies of Arcadia Legends

10 - Pikmin

Honorable mentions: Sonic Adventure 2 Battle, Pikmin 2, Ikaruga, Luigi's Mansion, Wave Race: Blue Storm, Beyond Good & Evil, Prince of Persia: Sands of Time, Tales of Symphonia, SSX Tricky, NBA Street Vol. 2, Need for Speed Underground and TimeSplitters Future Perfect.

Overall I don't like GC, too many disappointments for me to handle.

10.need for speed underground
9.mario sunshine
8.RE zero
7.luigi's mansion
6.metroid prime
5.SSBM
4.RE4
3.MGS: twin snakes
2.REmake
1.wind waker

1. Resident Evil 4
2. Legend of Zelda: Twilight Princess
3. Metroid Prime
4. Tales of Symphonia
5. Legend of Zelda: Wind Waker
6. Mario Kart: Double Dash!!
7. Super Smash Bros Melee
8. Soul Calibur II
9. Metal Gear Solid: The Twin Snakes
10. Sonic Adventure: Director's Cut DX

1. resident evil 4
2. super smash bros melee
3. sonic heroes
4. dragonball z budokai 2
5. mario power tennis
6. teenage mutant ninja turtles
7. mario kart double dash
unfortunately, i never got to play every gamecube gem, but from all the games i have played, these seven stand out in my mind