In no particular order...
It
Nightmare on Elm Street (original)
Darkness Falls
Alien
Excorcist
Phantasm
Friday the 13(1-4 only)
Halloween series(except #3, Season of the Witch)
The Thing
Salems lot
...and I love horror movies(good one's at least)
-Gone in 60 seconds
-The Crow
-I Know What you did Last Summer
-Ferris Bueller
-Top Gun
-Beverly Hills Cop
-Flash Gordon
-Its a kind of Magic(Highlander 1 soundtrack)