[SEJeff]

I do! I'm a Linux Systems Engineer by trade who writes python/golang code which is deployed on Linux servers. Perhaps I'm an odd one in that traditionally, I was a systems administrator, but I'm comfortable with the Linux desktop and will likely never turn back. Currenty, I use Fedora, but the company is standardizing on RHEL7 for desktops, and it isn't all that bad at all really. I quite like it. My home laptop and 2 desktops are also Fedora 20/21.

Granted, I'm typing this comment from the beast[1] in this picture (4x dell 30" monitors) with the NVS510 video card under the hood, but really it works amazingly well. I don't honestly see any benefit to moving towards Windows or Mac OS X. OS X has homebrew where I can get some of the much nicer GNU utilities, but the stock BSD userspace I find lacking. I use several of the gnu-ish features like sed -i, grep -r, etc, etc. Perhaps it is because I've worked on Linux for > 10 years, I just find it totally second nature. That being said, I bought my wife a MPB as it is shiney and unix under the hood.

Just use what you're comfortable with. I won't even interview at a place that won't let me run a Linux desktop (seriously).

[1] http://www.digitalprognosis.com/pics/my-work-setup.jpg