Tetris 99 is fun. I've tried Fortnite and PUBG, and they were alright, but not really my thing.
Personally, I enjoy every Mario Kart game, but MK8/MK8D is my favourite. Every game prior to MK7 has weird controls which I don't like and out of 7 and 8, the latter is definitely superior. Maybe I feel like this because MK7 was my first game (well, technically that's not true, because I played a lot of MK64 when I was a kid, but that was on an emulator and really long ago so it doesn't count), but eh.
The game I enjoy the least (but still enjoy for the most part) is MKWii, because if you don't use a bike and Funky Kong you are at a clear disadvantage, which gets annoying. Also, the bloom literally makes my eyes hurt after a short bit of playing.