Thanks for your help. So far I haven't solved anything, hehe.
1. I tried to remove unity and all its dependencies, however there are still some traces of unity/ubuntu-desktop (such as themes, lightdm). Is there a way to completely remove everything that was installed when I originally ran
? I'm thinking of re-installing Mint just to be sure that there's no trace of unity left.
sudo apt-get install ubuntu-desktop
2. I'm a bit confused about the route of installing a different DE under a user profile. Aren't all DEs available to all users before logging in (i.e. in the MDM/lightdm/GDM login screen)?
If so, how does installing the DE when logged in from a different user solve this?