Have you seen the Chinese horror movie "Gin Gwai" a.k.a. The Eye from 2002? It was remade in 2008 I believe with Jessica Alba but avoid the American remake at all costs! The original is so much better and extremely scary. That movie gave me some of the worst nightmares. I couldn't go back to sleep when I woke up in horror during the night.

I'm not sure what makes you scared. Some people are afraid of seeing ghosts in movies but some people are afraid of ugly looking monsters or serial killers. Tell me what type of horror makes you scared and I can help you find some great movies. I'm an expert on this field ^^