Zombies have been done to death (or, perhaps, undeath) and one zombie film is very much like the next one. There is really not enough one can do with them, storywise, to keep people coming back. I place them in the same bracket as most "Horror" slasher flicks: they're not real horror (psychological) and suffer from the old "showing the bear too early" syndrome; there is little tension left to manipulate your audience with.
The only zombie thing that shows any promise is this new "Walking Dead" series - and then only because they focus on the universal story of human survival (and keeping the zombies in the background)...
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I love zombies but agree with this assessment.
I honestly think the only person to get Zombies right in serious films has been Romero with his first two films (haven't seen walking dead yet). He understood what you say, that the real interest in a zombie film aren't the creatures themselves, but the human survival story and the interest in an apocalypse setting.
When I think of the best scenes in zombie movies, It's not a gory kill, but the atmosphere of a scene like this...
[yt]http://www.youtube.com/watch?v=9TTtLEeT_08[/yt]
Going back to werewolves, considering the popularity of emo vampires, I can't believe werewolves haven't come back in force. Lon Chaney spent half of those films seriously depressed or trying to commit suicide.