Nighmare on Elm Street, I was overseas living in New Zealand at the time going to the movies to see Fright Night and Back To The Future (they have intermissions in the middle of their movies) when my Aunt taped Nightmare On Elm Street for me, so I hadn't heard of it. WOW, everyone wanted to come over and watch that tape (I had a special pal tv and video machine). We were all really impressed.
This one was actually hard for me to choose from but i had to choose Monster Squad. One of the greatest movies of all time. And plus you can't beat all the main classic monsters all rolled up into one movie. My second choice would be The Gate just for the fact it was my very first horror movie i have ever seen and then 3rd of course Killer Klowns From Outer Space b/c you can't beat Clowns terrorizing a town and killing people by putting them in cotton candy and then sucking the juices right from them, shadow puppets, popcorn, or even balloons.