Title says all.
My favorites all tend to lean into the Action/Adventure and RPG genres. I just find the stories interesting, the gameplay fun and enjoyable, and the experience overall fascinating.
My least favorite genres are simulation and (sometimes) shooting. Simulation games get boring in the first few hours, so I don't see why people buy them so much. I'd rather rent a Sims game than buy it. (Damn bathrooms in Sims are hell) Shooting games are the games that I absolutely fail at, and failure usually pushes me away from them; that, and many, many shooting games are overrated to the point of annoyance.
Enough about me, tell me about your faves.
-HWL/KK