Guessed by @TruckOSaurus
The game everyone has on their lists, and for good reason. As far as racing games go, it doesn't get much more fun than Mario Kart 8, if at all. This game has bags of content, great music, beautiful visuals, and most importantly, some good ass gameplay mechanics. It's the only Mario Kart game I like, actually - to bring me in despite its franchise is a testament to how good it is.