AVP 1 is actually one of my guiltiest pleasures :) -- it scratches a lot of my scifi-horror itches (mysterious originator civilization that was seeded with ideas like architecture and religion by aliens, big group of humans with weapons being hunted down one by one, weird maze-like house of horrors, isolated setting)

I first watched it when it came out and I was in the fourth grade, so I definitely have a lot of nostalgic value attached to it. I try and watch it at least once a year!