I mean the main thing that makes Mint Mint is the desktop environment (cinnamon). I often argue that this interface is dated and will drive away users looking for something more modern. But functionally, it's perfectly fine.
Personally, I just think it's fun to install different distros and see the way they handle things and find one I like the most, but I've never used one that was unacceptable (except Ubuntu).
The difference between distros is just what they come packaged with. i.e. which kernel, systemd, desktop environment, update manager, package manager, etc.