Last year I was fed up with Windows, and switched to Linux. Since I had a lot of experience with Linux already, I went with Arch. I thought it was going to be really difficult. Sure, the initial setup was a lot of work, but now I'm extremely happy with it. Much happier than I ever was running Ubuntu, Mint, etc.
But anyway, nowadays I don't even think about that I'm running Linux anymore. I have a pretty big Steam library and play a lot of games. I install a game, I run it, and play it. I haven't found any instance where it doesn't work yet. Granted, I don't play multi-player games nor games with DRM (I'm a patient gamer, most games I play are >2 years old).