darthvader39560: AvP 1999 and AvP 2- Loving it. I usually only play as the predator because its my favorite movie though. I've also played some AvP 2010, but the campaign was really short.
Short campaigns is a sickness of modern games. The original Medal of Honor Allied Assault has a campaign worth maybe 100 hours of playplay, I'm still busy finishing it, having started a year ago or so. The Medal of Honor 2010 game's campaign was only 10 hours, which I finished in a couple of weeks.
I think it has to do with the richness of the graphics: if a map is so very detailed, it takes far longer to create one, so it gets too expensive in time and money to create maps to last the campaign for dozens of hours. If only the game industry didn't think graphics is the most important part of the game, but the gameplay itself.
*edit: I don't know what made me make up the word "mothern games", but it sure ain't english.