As far as AvP goes, it may be worth 5 bucks for someone who likes coop - the last stand mode is basically Left 4 Dead Survival with Marines shooting Aliens instead of Survivors shooting Zombies. It's at least fun for a while.
But you don't play multiplayer...
Basically no, I don't, but I will play the odd coop game. (Or did you forget our Titan Quest and Trine soirees?) I tried it for long enough to be able to make the recommendation I did.
I only play coop if 1) I'm on my LAN at home with everyone in the same room or 2) If one or more of my friends asks me to join a game. I may not like multiplayer, but I can be accommodating to friends.
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.” - Mahatma Gandhi