I can't quite get over just how much time I played Goldeneye 007 with friends. I have to say, I miss local multiplayer - The PS3 doesn't support all that much...
I have two N64 memories that stand out though.
The first was back when Nintendo would send out VHS tapes for marketing. They were cheesy as heck, but I loved the video about Star Fox 64, and how it featured the rumble pack. I was sooo excited to play the independence day level, and to try out the Landmaster tank!
My other fondest memory was by far Legend of Zelda, Ocarina of Time. Hailed by many as the perfect game - It caught me at just the right age and it was an incredible experience. Memories of fighting Gannon after running out of magic for light arrows, riding my horse, playing the tunes on the Ocarina, or even just fishing, made this game a dream.
Good times.