One can maintain a healthy relationship with God and enjoy a horror movie or a fantasy novel. Neither will make you evil, only your heart can do that.
Whew...that's a relief. I'm a huge Stephen King fan (but I'm trying to lose weight)...Was getting kind of worried there.
My first roommate in college oh-so-many-years-ago was president of the local Baptist Student Union. First thing he said to me was "You're going to hell for reading that book," as I sat there reading King's The Stand. Told him I'd save him a seat. We didn't get along real well after that.