N64 gets my vote. It's home to ocarina of time and super mario 64, two of the most legendary games (in my opinion). The NES could go down too, but I personally enjoyed the N64 games more.
Great and instant classics! Probably the hardest Mario games of it's generation and future generations.
Yeah, I still fail to complete the first SMB on the NES. Yet I can beat Sunshine without losing any lives through the whole game... That's what makes the original SMB game an immortal classic.
N64 was okay. Super Mario 64 was good...but not really challenging. It lost that competitive edge that both 2D games had. Zelda was a good game...very nice to see in 3D. Star Fox wasn't half bad. Unfortunately, Mario Kart 64 was a disaster. The graphics were worth getting sick over. There were enough glitches to probably skip 6 courses! The gameplay went down the toilet as well. If you didn't have any friends, MK64 was a walk in the park. The tracks were too long...with little or no obsticles. It wasn't nearly as fine tuned as Super Mario Kart.