If gore is included in the horror genre, then that is not my cup of tea. I don't like seeing movies like Hostel series, Texas Chainsaw massacre, Friday the 13th, Resident Evil series, final destination series, etc. I put these types of movies as sick and retarded. Horror movies I have specifically liked:
-The Grudge series (both the Japanese and the remakes)
-The Ring
-What lies beneath and it's hindi remake Raaz.
-Shutter (both the original Thai film and it's American remake)
-1920 (bollywood)
-Vastu Shastra (I genuinely freaked out the first time I saw it)
-Bram Stoker's Dracula starring the young Keanu Reeves and Wynona Ryder
-Monihara (part of the bengali film 'Teen Kanya' directed by Satyajit Ray, which is a compilation of 3 films based on 3 short stories by Rabindranath Tagore)
-The Thing
-Alien
-Paranormal Activity and Paranormal Activity 2
-Anaconda (I dont know whether to classify this as horror or thriller). Not the sequels though.
-The Mummy (same reason as above). Not the sequels, again. May be it's my imagination and fascination with the Egyptian history and the mummies and the pyramids. I still see it sometimes when it is telecast on HBO/Star Movies. Even I took the The Mummy ride specifically when I went to visit Universal Studios at Los Angeles.
-Ginger snaps
-Silver Bullet
Will post more when I remember.