I can tell you which ones I don't like - stupid slasher flicks, where characters are only there to provide a body count, in which countless sequels are exponentially spawned, all of which just seem to run into the other indistinguishably after a time. That had happened to A Nightmare On Elm Street, which had been an incredible movie - till the story had lost it's punch with all the sequels of inferior quality. The same with Saw, which was one of the most innovative, disturbing movies I had ever seen, till they killed it with sequels. I never cared much for any of the Friday The 13 movies - I can hardly tell one of those movies from another.
I love horror films with a well written story, such as The Thing, Angel Heart, The Hitcher (the original), etc. I don't mind gore, if it's not gratuitous - so many lesser horror films make internal organs and blood the whole point (one poorly made movie had scene where a girl vomits her own intestines in an otherwise bad scene). After all, I absolutely loved Re-Animator, which might have been a gore-a-minute flick. I'm still up in the air about Sergio Argento's horror films from Italy, such as Suspiria, or Demons, in which blood and gore is splashed about often without rhyme or reason; and yet, the stories are just so out there much of the time that you can't help but like them to a degree.
-Bill, otherwise known as Kraichgauer