lol, I had nightmares about Alien before I ever saw it. Just the idea of the thing coming out of a person freaked me out enough that it got to the point where I finally said to hell with it and just watched the damn movie already, so I could stop having bad dreams. I don't usually watch movies of that kind, but found myself strangely drawn to it nonetheless--despite the one bloody scene, most of the fright is very psychological and minimalistic, which can be quite a lot more effective.
I also have the Intrada soundtrack release containing the complete score as composed by Jerry Goldsmith. It's rather a shame the way the music was treated, because it could have been an even better film if they hadn't cut it apart and downplayed it so badly.
I've only seen the first two films in the series, but have no interest in the others due to reports of lack of quality and the way the ending of Aliens is completely trashed.