Urusei0Yatsura:
I've never watched or read a horror anime/manga and I want to. What do you recommend?
UruseiNeo:
Higurashi
cata:
Well... Try Elfen Lied or Berserk.
Not sure if it qualifies as horror. More like lots of blood.
foxhead556:
Ill say devilman or hell teacher nube(funny most of the time but it can get pretty scary :X
Revenge:
Well, you have Devilman, if you like mecha, Genocyber (it has a large amount of gore). And from Lady Takahashi, you have Mermaid Forest!. MF is very, very good.