The Blair Witch Project (I can never go into the woods at night without being creeped out after seeing it)
The Exorcist
Salems Lot (The original TV movie, in my opinion what horror should be like)
A few episodes of the Twilight Zone like "The Dummy" scared the shit outta me when I was little.I've got fond memories of watching The Twilight Zone every News Years eve with my mom
Jaws (My favorite movie, It's not immediate fear untill yo go in the ocean, and since I live in Long Island, Im in the water alot,which means the movie scares me often)
IT- terrified me as a kid
Pet Cemetary (saw the movie around Halloween when I was about 7)