Mario Kart.
Specifically, Mario Kart Wii.
I see a lot of hate for this game and a lot of people say it's the one that killed the franchise for them, but I cannot for the life of me understand any of it.
Yea, bikes are kinda OP, but there are ways of discluding them from races, there are 32 unique and memorable tracks, 16 of which are newly detailed and rendered classics, the online functionality is by far the best I've seen on the Wii and better than most 360 games imo, and most importantly, THEY GOT RID OF SNAKING!