If the SNES defined my dorm days of college, the N64 defined those college days (and beyond) after the dorms. This system had amazing solo-games and equally awesome multi-player games. Also, the N64 features the best games for many franchises (Mario, Zelda, Mario Kart) although the Wii might change all that. Still, the N64 was a great system that surpassed both predecessors and those that followed.
1: Mario 64
I vividly remember the first time I played this game. It changed gaming for me. The 3D worlds you explored were so vast, varying and just fun to hop around. Oh, and the play control of Mario is possibly the best of any game I've ever played. I really felt I was in control of Mario and could make him jump in ways even I didn't think possible. Add on the crazy puzzles of each world and you have a winner. I beat this game, and collected tons of star, although that fire world still intimidates me.
2. Zelda: Ocarina of Time
Considered by most the best game on the N64, maybe ever. I consider it of the highest quality, I just enjoyed Mario 64 more. This game made adventuring easy and battling fun. It took it up a notch so to speak. It is hard to find any faults in this game. I guess my problem is I never got past the Shadow Temple. Not because it was hard....my game got erased while I was in the Temple. Twice. I have never gotten the nerve to go back either. My loss.
3. Perfect Dark
This is the best multi-player game ever, period. (and I will punch you in the teeth if you start talking about GoldenEye) First, this game was a top notch First Person Shooter, much like 007. But the Co-op function was amazing, and it really helped having your buddies play with you (even if you shot your friend and the President with the sniper in the dark.....) Next, the multi-player had the absolute most options ever seen, and it hasn't been outdone since. You want to play every man for themself? Check. How about 2 players versus 20 Sims just to see who can mow the most sims down? Check. Then there were the challenges!!! I get excited thinking about how awesome it was to develop a strategy, assign roles and complete each challenge to various difficulties! Why oh why hasn't there been another game even close to these options???
4. Mario Kart 64
Dominant play control and great multi-player options made this a winner. You just never got tired of playing this game with friends. It also marked the advent of most of the items in the game you have seen in the Cube, DS and Wii versions. Classic.
5. GoldenEye: 007
Probably the most famous FPS this side of Halo. It was revolutionary for a home console to play 4 of your friends in such epic combats. The only place you would ever hear the phrase: "Stop shooting me, I don't have a weapon!" "Well, then don't slap me in the neck!"
6. Mario Golf
The best golf game if you just want to have fun. I have a special place for this game in my heart because I became dominant at this game. I was a superb putter and rarely ever missed inside of 30 feet. I lost maybe a handful of matches, so of course I love this game!
7. Zelda: Majora's Mask
This game gets tons of points for just being different. The premise of the game was that the moon was going to crash into the Earth and Link had 3 days to save it. If by the 3rd day you couldn't get it done, you just put on your mask and start again at day one. Each time you would learn a little more and figure out what to do next. A little bit like the movie Groundhog's Day, really.
8. Star Fox 64
A great space shooter, this took the game play of Star Fox and the graphics of the 64 and made such a great game. Add on the multi-player dog fight and this game had a lot to offer.
9. Mario Tennis
Strangely, my favorite tennis game of all-time. Great gameplay allowed most anyone to pick up and play. I believe I am undefeated in singles play still to this day.
10. Pokemon Snap
Again, props for creativity. In this game you were placed on a track and given the challenge of taking the best pictures of the passing Pokemon while you threw crap at them to make them do crazy stuff. It had great charm, and getting that perfect picture was so rewarding. Plus....come on, Pokemon are just fun, especially when they say their names. Bulbusaur. Psy....Psy.....geodude.
Lacking entries: Sports
If the N64 had a fault, it was the lack of quality for the sports games. I don't know if it was the new joystick or what but developers just couldn't make a sports game worth playing, leading most gamers to the PS1 for sports games. (and RPG's)
Again, please comment about the games I missed or just don't like as much as you! (Notable games I just didn't play include Smash Bros and Conker: Bad Fur Day.)