My favorite movie till date would be Exorcist. I like it for the way it is scripted and the way it is made. They special effects that was shown made the ghost feel so alive. Also the actress Linda Blair portrayed the role of a possessed person very well. I have watched this film long back and till today whenever i watch it i still get goose bumps.Another movie that I liked watching was Wrong Turn which was scary and it portrays the truth about a human being turning into a carnivorous where we know even in the real world one human being eats another human being but I would never categorize it in the horror section and rather call it nasty as it is.