I saw The Conjuring a few days ago. I didn't get much sleep that night, but I thought it was an excellent film all-around. Usually a horror movie will have campy acting or a ridiculous script or some other obvious weak point, but I actually appreciated all aspects of this film, which seldom happens when I watch horror movies.
The Saw series will always be my favorite. The story-line may be convoluted and constantly regurgitated, but it takes an interesting take on how the human mind works and what lengths a person will take in order to survive. The brutality in some of the torture scenes is fun to watch as well. Of course, after the fourth movie, they seem to have run out of ideas and began milking the franchise before people lost interest; Nothing of real importance really happens after the fourth movie. My favorite out of the series would be the second (or third) movie, where the main antagonist, John Kramer gets the **** beaten out of him by the cop. That cop was the only person in the entire series who I didn't want to see die, especially in a quick and meaningless way; All he wanted was to see his son again.
The first one certainly was the last horror movie, and the first one in a very long time, that I didn't end up being disappointed with going to the cinema for & actually managed to give me the creeps.
My one gripe would be the movie really never should have left the room, but arguably it's hard to think of how they would have kept that up.
All of its follow-ups I didn't think very much of. What else is there, let's see. The Changeling certainly gave me the creeps in my young teens. Seeing it back years later I don't think it did all that much to me; atmospheric though, perhaps.
There must be so many. The Beyond, lol, similarly scared the hell out of me at around that age; an utter disaster reseeing it so many years down the line.
From the rather more mainstream dept., Poltergeist I somehow never get tired of seeing. Funny, scary, great effects... (any of the sequels you can safely chuck out the window, of course).
Silence of the Lambs for me has always been a twisted, gripping, wonderfully put-together film. Anthony Hopkins' portrayal of Hannibal Lecter is one of the most sophisticated performances I've ever seen.
