I honestly will fight free to play unless somebody can actually convince me of where free to play has improved games, either in story, game play or immersion. This is disregarding what you prefer your game delivery method to be. So if you like playing free stuff great, you might play it because it is free but does it…
Before everyone overreacts, it might be useful for stuff like Free-2-Play games where you can choose to have the ads and play for free, or pony up a few bucks and not have to look at them.
Well before tf2 went free to play, cs 1.6 was the first and cs:s was the second most played game on steam. Actually since the main flood of people playing free tf2 is coming to an end I wouldn't be surprised if they are back at 1st and 2nd.