[holden]

Other than the lame-o "plot" and uninteresting human characters in the first AvsP movie (i mean, c'mon, couldn't they at least make Sigourney "Ripley" Weaver go back in time?!),
i think the big problem with the film was that the Alien wasn't scary enough anymore. Sure, it kills most humans, but i don't recall the Predator having any trouble with it. The Alien seemed smaller, like an insect to be swatted around and squashed, rather than the super-scary baddies in "Alien" and "Aliens". Maybe we saw too much/too many Aliens. In those first clasic films, less was definitely more.