On average every 2 years I'd pick up a few distros of Linux, play with it, then drop it and go back to OS X. This continued until recently. This last year I've been on Linux for the first time. Specifically, Linux Mint.
OS X hasn't been going in a direction I strongly care for (10.6 was my favorite, as well as Windows 2000). I'm a power user who just wants things to work. I don't need all the bells and whistles. I want a low maintenance experience without bugs, that just works. Right now Linux Mint is that on my hardware.
The only modification I've done to the system is using the graphics card for v-sync instead of the cpu. Outside of that, I'm on a 4k monitor that works at 60fps. I've not had a single crash or noticeable bug since installing (except a bug in Firefox). I haven't had to go deep in the terminal, but I have built custom versions of software. eg, the version of cmake on the OS is older than the version needed to build cuda projects that use cmake.
It's a minimum no bells and whistles it just works experience. So I'm happy. Is it for everyone? No. Are more every day desktop users going to be picking up Linux in the near future? Probably. Video game support has gotten so good on Linux that people who play video games have been slowly jumping ship. I've been surprised.
Though, if they break anything, I'll go back to OSX.