One of my personal favourites, I was lent the first few episodes a long time ago and was forever drawn into anime from then on. Even though it's pretty dated now, i think it's classic more than anything, the art is elegant and sweet, while dark where appropriate. The story is not for everyone, although most of the early stand alone type episodes are easy to watch, but the final few episodes can be pretty devastating, in an excellent story telling sort of way. If you like watching people be destroyed emotionally and physically in a real world type setting by the supernaturalthen this is for you.
Also, i love Larva