Necroing again. Sorry folks. Only just saw this now.
I've been using Linux since roughly May last year. I made the switch because I started contracting from home and needed Linux for development, but I did some gaming on it too. You're still very limited compared to Windows 10, but it's not dire. There's very few games that I wasn't able to run so far. Most indie games support Linux out of the box and many AAA games now have native Linux support. For anything else, you can usually use WINE. The biggest problem I had with Linux was finding good drivers for my AMD card (because AMD). Apparently it's not as much of an issue if you have a newer card or an Nvidia GPU.
I moved to Germany last year in August, so I don't have a desktop at the moment because GPU prices and all that. I want to build one this year and I'll definitely go straight back to Linux once I get it. For everyday use it's an awesome OS and I can highly recommend it. I just can't imagine working with Win10 again. It's the most infuriating OS I've ever used. I'd rather fiddle a bit in Linux to get my games running optimally than go back to that trainwreck.
It's very funny because Microsoft has been nailing everything on the Xbox and I can't stop singing their praises for it, but Windows 10 just gets worse with every update and I can't stop hating it.