So, shall we discuss the AvP games? :p Of which we've had about 90 and they're all varying degrees of "alright" to "FUCK YEAH MAN".
I just completed the newest game (Aliens vs Predator 2010), and it was pretty good. The combat mechanics are a bit dodgy (How many bullets does it take to kill a single drone? And why can I PANCH ALIEN IN FAEC and get away with it? Also, FUCKING INSTAKILLS IN MULTIPLAYER MAN) but it's damn fun and a pretty nice looking game. I also like the way the campaigns took place on the same map (hi, recycling of terrain) which didn't feel cheap but actually felt kinda cool. They also have the predator and alien playstyles down to a T, but that's to be expected since Aliens versus Predator 2 did them well, too. My favourite part of the game has to be that, even on normal difficulty, things CAN kill you if you're stupid. Things WILL kill you, in fact. Even with semi-regenerating health and shit tonnes of health packs, you will still die often, usually from a swarm of xenomorphs bumrushing you.
I still think Aliens versus Predator 2 did multiplayer best, though. The game is ugly as sin, but I'm still considering finding my CD and playing again. Jumping into an exosuit and crushing xeno heads or turning into a queen after being a tiny little facehugger was just ridiculously fun. The combat was fairly fluid, and even fun to WATCH - as a predalien jumps out of a vent, runs towards a marine, smashing his face in before getting shot apart by a bunch of marines coming around the corner.
Feel free to contribute, ladies and gents. :p Anyone played the newest AvP, or have any idea which one is your favourite?