The thing that bugs me most about zombi movies (or TV shows) is that nobody in the movie has ever seen a fricking zombie movie. If you're watching a vampire movie (or whatever) and someone in the movie says "I'm a vampire" everyone else is like "cool, so you're immortal, you live off blood, you can't go out in the sun, etc." but in zombie movies nobody has ever heard of a zombie and it takes them half the movie just to figure out what they are and how they got that way and how to kill them and all that stuff that everyone already knows about zombies. For some reason that really sticks in my craw. That's not to say that every zombie movie is bad, just that the genre as a whole is lacking.