In general, I am not a horror movie fan and 1408 left me somewhat cold except for the very fine performance of John Cusak, who seems able to take on the "everyman" role better than anyone. "Everyman" but with a small questionmark. I don't want to give much of the plot away, but it is one of those horror films that put you inside the horror early on and you never can escape.
I prefer those movies that allow retreats when you/protagonist gets to mull over the circumstances and investigate them.
What are you five favorite horror films? Mine are 1) The Shining (although it breaks my rule) 2) The Exorcist 3) Jaws 4)Don't Look Now 5)Alien
I could think of many more but in general, it's not my favorite genre because of the startling factor in most of them.