Sinister
Ok, you all know I love all scary movies, even the terrible ones. I like to be scared. Ok.
This movie really got to me. I haven't been so creeped out in a long time.
A true-crime writer moves his family to this town to be closer to where the action happened. He doesn't tell his wife and kids HOW close - they bought the house where a whole family (except one missing daughter) was murdered. (None of these things are spoilers)
Anyway, he finds a box in the attic labeled "Home Movies" and they are all movies of different families being killed. These really freaked me out, and I've seen it all.
I won't spoil the rest, but I recommend this movie if you enjoy being scared.