The all time winner for most replayed game for me.
So far there have been six Mario Kart games released so far:
I only haven't played SNES or GBA. To this day I still love playing 64, it handles just perfectly even by modern day standards and it's just so much fun. GC is excellent with duel racer variety and weapons and great courses but I do miss dragging items from 64. DS is a great combination of GC and 64 (you can drag items!). Wii I just hate. The controls are crap, only a few of the levels are interesting, and it's back to a single person. But mainly it's the controls being crap.
So I would say GC and 64 are tied for first with DS close behind.

- Super Mario Kart – (Super Nintendo Entertainment System (SNES), 1992)
- Mario Kart 64 – (Nintendo 64 (N64), 1996). Also available on Virtual Console, as of 2007.
- Mario Kart: Super Circuit – (Game Boy Advance (GBA), 2001)
- Mario Kart: Double Dash!! – (Nintendo GameCube (GCN), 2003)
- Mario Kart DS – (Nintendo DS, 2005)
- Mario Kart Wii – (Wii, 2008)
I only haven't played SNES or GBA. To this day I still love playing 64, it handles just perfectly even by modern day standards and it's just so much fun. GC is excellent with duel racer variety and weapons and great courses but I do miss dragging items from 64. DS is a great combination of GC and 64 (you can drag items!). Wii I just hate. The controls are crap, only a few of the levels are interesting, and it's back to a single person. But mainly it's the controls being crap.

So I would say GC and 64 are tied for first with DS close behind.