My favorite game this year so far is probably Celeste. Really fun platformer with a surprisingly interesting story. Not sure how you'd like it though, it's Super Meat Boy levels of challenging.
Kirby was fun, but nothing really that special. Detective Pikachu looks fun, I have it but still need to play it. My GOTY list will probably look a lot better in September when Spider-Man, Tomb Raider, and Spyro hit. Until then the only thing I want to pick up is the Mega Man X Collection.