I liked how unforgiving the aliens were. Babys, Kids, Pregnant chicks.. Doesn't matter to them. That's about all I could enjoy because the movie was so damn dark you couldn't tell predator from alien in half the scenes. I did however like it better than the first AVP.
Spoiler:
Favorite part was when the predator hung the guy up in the hardware store and used him as bait for the alien 