Why did I switch back to Ubuntu?
- Slower updates and broken repos - Ubuntu updates are slow, but Linux Mint's are even worse.
- No upgrade option - Linux Mint users aren't really given a simple path to upgrade when new releases come out. I at least like to try to upgrade one or two editions before doing a fresh install.
- Better support for Ubuntu - It's easier to search for and get online help for Ubuntu. There are just enough interfaces (nice, albeit) in Mint that it makes some fixes take longer than they could.
- The best desktop manager is neither unity or gnome-3 - I use the i3 window manager most of the time. That means I don't really care what the default windows manager is because I will run my own anyway. One can still get cinnamon, gnome-3 or mate (these are arguably the best normal wm's for linux) from within Ubuntu.