Comedy, but only certain types. No offence to anyone, but I don't get American humour...sorry.
Anyway, I am a total Pythonite....meaning I love Monty Python. Not just the films! I love the TV shows more, but the films are great too (...this is where everyone starts quoting The Holy Grail to me
). I also love 50s British comedy films, and the Carry On films are great too.
Probably the more recent comedy film I like is Shaun Of The Dead - that's the most recent one I can think of.
My second favourite genre would be horror...only because a couple of my favourite actors are in horror movies (mostly)