If there are things you like about Alien: Resurrection, The Predator, and AvP:R, surely, there are things you enjoy about A:CM. Don't say, "When I stopped playing it," or stuff like that, and please don't start debates about Alien 3, because we have a hundred other threads for that.
Alright. For me personally, I liked the inclusion of movie characters for multiplayer. Hudson could be a little less puffy, but that doesn't take away from the fact that you can play as the Ultimate Badass. I also like the fact that there's a wide variety of weapons to use, aside from the pulse rifle and smartgun.