Alright, horror movies according to Wyvern time.
First I have to say that horror to me is fun, real horror is CNN or the newspaper. Demons, ghosts, vampires, werewolves, slashers and other dark creatures of the celluloid are just clean bloody fun
"The Exorcist" (William Friedkin)
"The Thing" (John Carpenter)
"An American Werewolf In London" (John Landis)
"Nosferatu - eine symphonie des Grauens" (F.W. Murnau)
"Vampyr - Der traum des Allan Grey" (Carl Theodor Dreyer)
"Freaks" (Tod Browning)
"Dead/Alive" (Peter Jackson)
"The Devil's Backbone" (Guillermo del Toro)
"Rosemary's Baby" (Roman Polanski)
"Deep Red (Profondo Rosso)" (Dario Argento)
"Dellamorte Dellamore" (Michele Soavi)
"Night Of The Living Dead" (George A. Romero)
"The Omen" (Richard Donner)
"The Others" (Alejandro Amenábar)
"The Howling" (Joe Dante)
"Wolf" (Mike Nichols)
"The Entity" (Sidney J. Furie)
"Deliverance" (John Boorman)
"Hellraiser" (Clive Barker)
"The Serpent And The Rainbow" (Wes Craven)
"Alien" (Ridley Scott)
"Invasion Of The Body Snatchers" (Philip Kaufman)
And of course "Frankenstein", "Dracula", "The Mummy" and all the other WB and Hammer horrors with or without Christopher Lee, Peter Cushing, Vincent Price, Lon Chaney Jr, Boris Karloff, Bela Lugosi, etc.