I'm the same way with horror games OP, and I'll never understand why because, like you, I absolutely adore horror movies. I've watched far many too count in my years, from the 70s to present, and it takes a lot to actually frighten me.

And yet, the second you put me behind a horror game, I'm a complete wuss. Even so, I make myself play through Bioshock because I find it to be that enjoyable, and have done so surprisingly well. I have to keep motivating myself to walk around this or that corner, to enter this room and so forth, but I'M DOING IT.