It's funny seeing the range of what scares people. I've seen TONS of people here recommend Event Horizon, saying it was so incredibly scary, yadda yadda, etc. etc. I thought the movie was awful. Didn't think it was scary OR well written, etc...
But, on the other hand, I thought the Blair Witch Project was incredibly scary and creepy, and most people here think it sucks. I guess it depends on whether or not you like to think about something being scary or see a special effects team's interpretation of what's scary.