Originally Posted by Catlady
Definitely The Haunting of Hill House, by Shirley Jackson.
I really tried to like Haunting of Hill House, but unfortunately I couldn't (it felt more like a story about madness than supernatural horror).
by Robert Bloch and Rosemary's Baby
by Ira Levin.[/QUOTE]
is pretty good, I can second that (although if you've seen the movie, you're not missing much).
@OP: If I can recommend some quaint 19th century horror, check out Robert Chambers' The King in Yellow
(first 4 stories only). And I greatly enjoy Clark Ashton Smith's short stories - pick a random story and see if you like his style.