Horror Movies: Which kinds scare you? How do you get over them? Scariest horror flick?

I am scared most of movies that have some sort of supernatural entity watching the person who has no idea they are being watched. In movies where you see ghosts in the background and the main characters do not know this. Later on the spirits let their presence be known. I do not know why but it freaks me out. The best example of this and is my favorite scary movie is the underrated movie "Darkness". I came across this on accident and had to go buy it.