Definitely Mount Wario. It almost feels like cheating to pick it.
If I'm not allowed to pick Mount Wario, definitely Sunshine Airport. Beautiful-looking stage, really tight track, punishing at points but it rewards good play. Nice environment for a kart racer too, racing in an airport and on the tarmac.
If I'm not allowed to pick Mount Wario, definitely Sunshine Airport. Beautiful-looking stage, really tight track, punishing at points but it rewards good play. Nice environment for a kart racer too, racing in an airport and on the tarmac.