Well, shit just works? :)
The reason I run it is because I hate gnome, and I can have a stable system without it becoming a second job. If I want to run a newer application, I can just use Nix if it's not in the Ubuntu repositories.
A friend of mine uses NixOS daily, but it's far too much time I would need to spend to keep it working, and security updates on NixOS are just a nightmare. It's great for one-off program runs though.
Yeah I didn't take it seriously, that's why I put the smiley face. :)
I used Mint for a few years at work. At the beginning it was pretty good, but over the years it kept breaking more and more, and there was no way to upgrade to a newer version of Mint at the time. I was already using Kubuntu at home and it was solid, so now I also run Kubuntu at work.
The one thing I really miss about Mint is application vino-server. There is no good alternative for it anywhere, which is a shame.