For some reason, I often can't deal with stuff generally classified as 'horror'—even the quality pieces seem to be going a bit too much for shock value. That said, I very much like a good bit of creepiness—just not necessarily within the official genre.
Old Horror I always find more interesting—they've got a particular sense of disturbing, and never get into the terror for it's own sake field.
Top examples, for me, would be H.P. Lovecraft (of course) and the original film of The Cabinet of Dr. Caligari (Warning: TvTropes link!)
+1 for Lovecraft.
Also, The Birds. Haven't watched the movie, but the novelette was pretty good, as far as horror goes.