The original Evil Dead. You know, before it got fun with the Boomstick in the sequels, and before the end, as the cheesy death scene of the book was just "How much blood can we throw on this poor kid?" Not that scary of a movie, but no one should ever EVER be raped by a tree. And they definitely shouldn't like it. Hell no! SO WRONG.
Child's Play was scary; I'm a youngster, so I saw it over a neightbor's house when I was like 6. Freaked me out for years. Eventually came to terms with the creepy memory of a killer doll, so there's no need for Freudian theories now, though.
This was an awesome movie. Creepy, yes, but really awesome. Alas, this movie spoiled every movie with a surprise ending forever for me. After watching it in Psychology class back in high school, I'm conditioned to be aware of twists.
The Ring was pretty scary. I'll admit I looked away when Samira's eyes were shown near the end. But that was the only part I didn't watch. It had great suspense in it, though. I actually thought it was a good movie. I watched Ringu afterward (the original Japanese movie), which everyone said was scarier. Maybe it was the chore of reading subtitles the entire time, but it just didn't freak me out as much as the American version, and the girl definitely wasn't scary.
Other than those, nothing really fazes me; Alien, Jaws, Poltergeist, the Shining; they never did anything for me. I've played so many Resident Evil and Silent Hill games that movies just tend to fall flat now!