I'd really love to get back to my N64 games.
I've been holding off from Donkey Kong 64 for quite a while. It is an excellent platformer, with lots of secrets. I tried to get 101% or whatever in the game, and I did for the first 3 levels, and I got far on Gloomy Galleon.
Unfortunately, whenever I try to get everything in a game, I lose focus. I would really like to try and get back to it.

Also, Super Mario 64 is a game that I HAVE beaten, but I think I got the bare minimum. Also, I've never beaten it on a real N64. I sold it recently, so I may buy it again, as it is one of my favorite Mario games of all time(tied with Super Mario Bros.)