I agree with Zina, it's not all the blood and guts and gore that gets me, it's the psychological thrillers (well you'd expect me to be interested in the psychology of horror really, wouldn't you?) or the ones that make me jump just when I'm not expecting it...
I saw The Exorcist when I was about 18, having been told it was really scary, and I found it more entertaining watching the faces of my very naive, goody-two-shoes friends than I did watching the film!
Nothing much has changed there....
Still Ghost Rider, although I did watch American Beauty the other day too, and can't remember if I've said that one...