I get questioned all the time why do I use Linux.
For me it's not about the games but I get questioned if I am a programmer or a hacker (the common conception of it apparently). I am not by a profession but I enjoy puzzle and linux is an interesting and interactive puzzle. I still play games. Thankfully, the games I like are available on linux. So, it never really an issue.
I use a lot of alternatives and alternatives front-end. I mentioned in the previous comment that I enjoy discovering these and I often write a short review about the apps I tried which are mostly open source and alternative software.