TF2 will always be my recommend, too bad it didn't have a big MP scene.
thanks to steam its up to 10k players again (EU), lots of newcomers, a weird mixture of old players and newcomers, but it's a lot of fun, barely have to wait for games
was able to convert a friend of mine last weekend, I let him play the gauntlet drunk on saturday and on sunday he got the game and pushed through the campain in one sitting
scary how fast some people learn the movement if you show them 1,2 tricks. While we were both quite drunk it was very exciting to see how he went from sprinting here and there to slide-hopping and wallrunning. I can already smell that his titanfu is going to be Ronin