What Movies Spook You? What's Your Favorite Scary Movie?

So, this entry is not one of a specific movie but a handful. What movies spook you? When it comes to October, I found myself really geared towards the Disney Channel or ABCFamily when I lived alone. Their stuff, while spooky, is not really scary. I have to avoid FX channel because they play The Strangers and Syfy and Chiller usually have the good, the bad and the B-movies in terms of horror and gore.
This year, I spent most of my spooks in front of the TV while watching the FX show American Horror Story and picking up a few films along the way like When A Stranger Calls and Teeth (which, Teeth isn't scary but a definitely cult classic). So, what movies really get me scared?