I do like the concept. I also enjoy the free kills I get in TF2 as a result of it going F2P, and seeing some of them ragequit. But the thing I enjoy the most is the entitled, elitist whining from veteran players who think that Valve owes them more because of this, insulting the F2P players and acting like arrogant jerks. Hmmmph. "Valve has the best online community", huh? How's that working for ya?
As for other F2P games, I like them. And when it comes to micro-transactions, as long as they keep things fair. I despise games where you can "Buy to Win."