I am ambivalent towards Mint, and I don't personally use it. I stand by my recommendation that the best OS for running a node is the OS one knows best. Server-oriented OSes are ideal, but you really ought to know what you're doing. I don't endorse Mint, but I people seem to like it and find it easy to use.
This is more or less what I meant with my post. Though there are several systems which potentially suit a purpose better, at the end of the day, that means nothing if the user isn't able to configure the operating system to work flawlessly and securely, because he doesn't understand it.
For that reason, I often recommend against using GNU/Linux for new users if it's pretty much clear that they wouldn't have any idea about how to securely use it. And I'm sort of a huge proponent of GNU and Linux based operating systems.