Much like the Scream, I Know What You Did..., Grudge, Ring and Saw franchises - to me these all fall into the comedy genre.
The original Japanese Grudge and Ring series were far superior to the US remakes though and are far more enjoyable.
I must admit though, I liked both AvP Movies not for their scare factor, but because they had Aliens and Predators in them - so they were instant winners for me.
(I first saw Aliens when I was 5, I've never turned back since!)