Well my favourite N64 game ever is Conker's Bad Fur Day, but I'd encourage everyone to check out Body Harvest.

While the first 20'ish minutes of the game is very boring, the game then becomes a great gaming experience, trust me :-)

Ok, i gues where talking about normal n64 games here so mario 64 and zelda don't count ;) (would be to easy)
I would have to say: shadowgate 64
The game got killed by reviewers but i always loved it.
Another great game would be MACE the dark age a beatm up nobody paid attention to ,but great non the less.

Are you serious about Mace? :-)

I'd second Mace: The Dark Age.  It's an excellent Mortal Kombat style fighter and one of the ebst fighting games on the N64.

You should also look into Shadow Man.  It's a Zelda-like third person adventure but with a very dark story and a fair amount of platforming.  

Blast Corps is right up there for me IMO.

Tetrisphere! :-)

I recommend Space Station Silicon Valley. Quite an interesting piece of software for the N64.

Body Harvest was awesome. Loved all the different Vehicles. your right though Martin, it is quite slow at the beginning.

I've actually just started playing SSSV... it's a odd game but quite fun :-)

It's hard to imagine that the developers from DMA that programmed the game are the same ones that brought the world Grand Theft Auto.

Do you get a Wallace and Gromet vibe from SSSV?

Nah... the vibe I get from SSSV is "Baaaaah" for some reason....

GoldenEye 007, Perfect Dark, Banjo-Kazooie, Banjo-Tooie, Conker's Bad Fur Day, Blast Corps, Het Froce Gemini, Diddy Kong Racing, Donkey Kong 64, Killer Instinct Gold, Mickey's Speedway USA.

^ Rare made some awesome N64 games. On to other games:

Goemon's Great Adventure (Mystical Ninja 2), Mystical Ninja Starring Goemon, Ocarina of time, Turok (all games), F-Zero X, GLover, Superman 64.

Wish I had more to mention.

Sheep! Sheep!~ lol

I thought Mischief Makers was an interesting title.

There was even an article in my local newspaper about it. "Mischief Makers a Miss for Nintendo." I dont agree Mr. Columnists.

This game was FU-N!

Some sleepers... Mischief Makers for sure, Wetrix, Roadsters... and last but not least Tetrisphere, oh man I've "wasted" a lot of time playing Tetrisphere.

EDIT: Wait I've already mentioned Tetrisphere :-)

Another sleeper would be Battletanx, I enjoyed both of those, but the first one wasn't released in Europe for some reason....

sssv and duck dodgers, mario partys , and conkers bad fur day. toy story two wan't bad from what i remember as a child thought i haven't played it in years.

Duck Dodgers? now that's a new one. I've played Dodgers a bit and I found it a bit tedious.... it's a lot of the same, with not a whole lot to do.

Speaking of games based on cartoons, Donald Duck's Quack Attack is a bit underrated imo. It's a fun platformer