Really, if you are a horror fan and you haven't seen Shaun of the Dead, what are you doing with your life? Simon Pegg and Nick Frost are pretty wonderful as two average dudes who love getting wasted and talking shit all day. When they find themselves in the middle of the zombie apocalypse, to say they are ill-prepared is an understatement. This is one of those rare horror comedies that doesn't sacrifice one side of the equation for the other. The horror is horrific and the comedy is actually funny. There are even some touching emotional beats between friends and between love interests in here.
Worth seeking out if you are a fan of action and sci-fi movies are their other works: Hot Fuzz and The World's End. They all have something to recommend them. I also didn't realize it the first time I watched this movie but it is loaded with a who's who of British comedy. Not sure why i picked this to write about except that I love it so much. Either you know or you don't.