1 Super Mario 64
2 Super Smash Bros
3 Star Wars: Rogue Squadron
4 Pokemon Snap
5 F-Zero X

(I didn't really know about Zelda and a lot of other games when I was younger)

Super Mario 64
Goldeneye 007
Super Smash Bros.
Mario Kart 64
The Legend of Zelda: Ocarina of Time

Super Mario 64
The Legend of Zelda: Ocarina of Time
Goldeneye 007
Super Smash Bros.
Star Fox 64

1. Ocarina of Time
2. Perfect Dark
3. Mystical Ninja: Starring Goemon
4. Super Mario 64
5. Mario Kart 64

Wow! Two people mentioned Hybrid Heaven, didn't expect that. Great game, but not on my top 5.

Damn that's tough..here goes

1) OoT
2) Mario 64
3)Goldeneye
4) Mario Kart 64
5)Wave Race 64

But Starfox, Smash and Perfect Dark all worthy of being in the top 5.

So many great games* makes choosing 5 almost impossible.  so, in no particular order:

- Zelda Ocarina of Time

- Perfect Dark (the game that kicked Golden Eye off it's pedestal

- Shadowman

- Quake/Quake 2 (ok, so I cheated a lil bit)

- Turok/Turok 2 (oops, cheated again)

*Cartridges FTW!

I *heart* Kasz216 and Baddman for liking Hybrid Heaven
I *heart* Kwaidd for liking Shadowman

My list:
1). The Legend of Zelda: Ocarina of Time
2). The Legend of Zelda: Majora's Mask
3). Ogre Battle 64: Person of Lordly Caliber
4). Super Mario 64
5). Jet Force Gemini

Honorable Mention:

F-Zero X, Paper Mario, Shadowman, Hybrid Heaven, Mystical Ninja Starring Goemon, Goeman's Great Adventure, Banjo-Kazooie, Banjo-Tooie, Goldeneye 007, Perfect Dark, Starfox 64, Turok: Dinosaur Hunter, Turok 2: Seeds of Evil, Blast Corps, Conker's Bad Fur Day, and whatever other great game I can't think right now.

1. LOZ:OOT
2. LOZ:MM
3. Super Mario 64
4. Golden Eye
5. Smash Bros.

1) Super Mario 64
2) Legend of Zelda: Ocarina of Time
3) Mario Kart 64
4) Blast Corpse
5) Goldeneye 007

However, all the games in my collection are awesome (with the exception of Mission Impossible, which was ok)

The Legend Of Zelda: Majora's Mask
Star Fox 64
The Legend Of Zelda: Ocarina Of Time
Donkey Kong 64
Goldeneye 007