Alien without a doubt is the best of the series. The others just never did anything for me, and for the most part felt tired and repetitive. How many times can we see the alien's head come from around a corner, loom over the victim, and see the little mouth extension shoot out, followed by a spray of blood on the wall? Honestly they just got boring in my opinion.
On another note, I actually watched the new AVP: Requiem the other night(It was between that and The Diving Bell and the Butterfly that I rented, but I was too tired and just wanted mindless fun.), any of you guys see it? I'm curious as to what you thought. It had a few decent moments, but once again it got boring to me with the same old stuff happening. One thing is for sure though they didn't hold back on the usual taboo horror victims, they went in a new direction in this one!