Ooooh, where do I start on this?
I like certain types of Horror. I've talked about it here before so I'll keep the recap brief, I don't like serial killers or blood and guts stuff but I'm perfectly fine with messy werewolves and other monsters.
I love anything psychic or occult, ghost stories, good werewolf or other monsters, including plants. I like something that makes me think. Weirdness can be good as long as it's not too confusing.
Strange, alternate dimension creatures are good too.
I used to love vampire stories, but Twilight and the Romance genre spoiled that. I find a few exceptions still worth reading.
I find most of the Horror Classics are very good. Original concepts like a haunted post box definitely get my attention (that was a good one BTW).
There's a lot of great stuff in the Horror genre. I lean towards the more literary stuff over the sensationalist in general.