@tomasino Every kind! I guess my favorite is "gamedev dev" if that makes sense. I host game jams and other events to enable people to make games. I develop gamedevs. ;)
But to answer your question directly, My personal favorite genres to design are experimental/atmospheric games that barely fit the definition of a game, and on the flipside I love making extremely simple couch multiplayer arcade games.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko