I use Trisquel because it is recommended by FSF, is based on Ubuntu and I like Mate environment.

Mint, Trisquel. I couldn't run a software on Zorin (aldebaran choregraphe), I tried to solve it but unsuccesfully. So I had to change the distro. I chose Mint. Very friendly. Than switched to Trisquel because it's 100% free and recommended by FSF. But for someone who doesn't care about Free philosophy, I recommend Mint.