Just to make it clear: after I posted this , I did some research and it turns out I am using KDE Cinnamon actually... I installed KDE, and now I have options when in the login page to select which "session" I want: Ubuntu, Unity, Plasma, Cinnamon, Wayland... I have Cinnamon by default, and it is indeed my favourite... Plasma seems very cool, but too different from what I am used to... I might play with it later when I have more time though.