I do all of my work, from music composition, to game development, to creating this website, on GNU/Linux.
If You'd like to give it a try, I recommend this website's quiz as a way to pick a distribution to try. Or, You can do what I did: Jump in the deep end with Slackware Linux. I also currently use OpenSUSE Tumbleweed.
Thanks for this operating system are due to two people, and their respective groups: