^I'm not sure whether or not I should be aroused...
The Return of the Living Dead series actually made the zombies sentient and cognizant of their surroundings. They explained their desire to eat brains as a way of easing the pain of death.
Zombies are just plain nasty. That old blood stinks and what in the world is it with them, they can't feel anymore (like hunks of flesh missing) but they sure do feel hungry. They have to be the lamest of all the scary creatures there are.
YOU FORGOT ABOUT SHAUN OF THE DEAD, SIR!