Man, it's been so long that I've forgotten what Royal Raceway looks like. *looks on YouTube for refresher* Good track. Well, even though I'm not going to buy any new Mario Kart games until they bring back the exact controls of MK64, I'd like to see some of the N64 tracks (I didn't say SNES because I never played the game for enough hours to really develop favorite tracks). From the N64 version, maybe the three raceways, Wario Stadium (provided the 4-second-lap thing is fixed), and Yoshi's Valley.
EDIT: Oh man, I did NOT just forget Toad's Turnpike. That has to be in. Preferably in reverse so the cars are coming at you, that's always more fun.