I'm going with platformers. Whether it's 3D, side scrolling, 2.5D, single screen, infinite runner, or even isometric, give me some running and jumping and I'll be happy. To be fair, I have a lot of nostalgia for the genre, but I also like the combination of level design, mechanics, challenge, charm, and power ups. And there's just something satisfying about all that running and jumping. I think the world would be a better place if platformers were the dominant genre like they were in the 3rd-6th generations. Hell, my all time favorite game is Super Mario 64.