Depending on the machine I use. My laptop is one of the few machines that can run entirely on open source from Firmware, drivers all the way to the top. Thus I run Trisquel. Definitely not for everyone.

But on other machines, I just run Mint. It is just a nice and comfortable thing. The base Cinnamon desktop is basically just Windows 7 locked in place with a few quality of life improvements. Not too ambitious but that ends up keeping things simple and mostly just works. For those that want more power and tweaking it isn't the best choice.