I was a BEAST in Mariokart 64. Played it so much I could do the tracks backwards. Wario was my main, and I loved hearing his "I'mma WARIO! I'mma gonna WEEN!" line. Also, Rainbow Road on the N64 had one of the best themes ever. So yeah, that one was my favorite too.

Now, I only have Mario Kart for the Wii. It's good too, it just has some control issues, especially if you're trying to use the Wii Wheel. Protip: Don't use the Wii Wheel, unless you just really want to handicap yourself.