Wow for me as well, both Wrath of the lich king and Cataclysm leveling was pretty intense. Think it was 30h or so straight for Cataclysm, but done with wow and don't see myself playing an mmo like that again.
District 9 would be my first recommendation. Haven't seen everything on the list, but from those I've seen I'd say The Hangover, In the Loop, 500 days of Summer and Public Enemies are worth watching. On the other side of the scale is Knowing, which I thought was dreadful.