1. The Thing is pretty much my favorite horror movie, so I kind of have to agree with most people in here. There's just so much that is right about that movie. Everything from the acting, the effects, and the musical arrangement is great!
2. In the Mouth of Madness is certainly a close second though, and one I don't see being mentioned much. It has some absolutely genius moments, and I would call a must-see for any fans of John Carpenter and H.P. Lovecraft.
3. I also liked Big Trouble in Little China (that movie is crazy). A little surprised that Starman still stands at no votes. It certainly isn't like his other films, but it wasn't bad by any means either.