I'm more of an older horror fans. I remember the old double features they'd have on base like "The Crawling Hand" and "Day of the Triffids." B&W, low budget, cheesy and fun. Mom would drop me off and she'd have several hours of peace while I got the crap scared out of me.
Every time someone mentions the Exorcist I am reminded of Richard Pryor's SNL skit:
Horror, is of course, in the eye of the beholder. Some no doubt consider a Rick Roll to be horror the it intrudes on a comment stream. I do concur on Halloween. My favorite scene is right before the end: