I do play tons of Indie games (Platformers, Metroidvanias, Roguelikes), I like RPGs / JRPGs, Character Action Games (Bayonetta, Metal Gear Rising, God of War, Nier: Automata), Souls-likes, Fighting Games (I should try Killer Instinct), "Walking Simulators" (Gone Home, Stanley Parable, Fire Watch), SRPGs (Fire Emblem, Banner Saga), RTS (Halo Wars, Starcraft), Couch Coop/Versus (Overcooked, Mario Kart, Towerfall) and unique experiences like Shadow of the Colossus, Journey, Jazzpunk, Grow Home, etc.
My top 3 games are Ori, Bloodborne and Bayonetta 2.
I played a bit of Forza Horizon 3, but I'm not big intro cars and racing games, so I lost my interest after a few hours. I really loved Halo 3, but 4 and 5 aren't doing anything for me. I've played a good bunch of Gears 4 and really liked it, but I'm done with it. Cuphead is my second favorite game on the One.