My husband and I have noticed that, since becoming atheists, many scary movies just aren't as scary any more. We now have a lot more trouble suspending our disbelief. Anything involving ghosts, demons, etc., just doesn't do the trick for us like it used to.
I guess when you believe in a god and an afterlife, there's all sorts of "unknowns" that you have to be open to. And scary movies can really take advantage of this. But once you've decided that what you see is what you get in life, suddenly horror movies have to work a little harder to be effective.
Any else notice this? Do scary movies just not work as well on atheists?
(As an aside, the movie The Descent is really scary and based on a scenario that jives with evolution. I recommend it if you feel like really freaking out the cats with your sudden screaming.)