Going to the point, i use Ubuntu Gnome 15.10, but want to change OS any time on the future, in preference to something that doesn't have SystemD (you know what i mean) like Void Linux or Devuan (Debian). One thing is the way of doing things in each one, that for the most, aren't so different from one another, but more about the environment and 'workflow', to at least have KDE and I3WM, one that is simple to customize and very 'common' in functionality, and for being very customizable, made to look like anything from 'Windows', to MacOS/Unity or Gnome 2 & 3 ; And the other just to change a bit, a tiling window manager with great customization power (if you know how to edit the .config file) and a considerably different way of working - no task bars, no 'Start' menus, window borders, etc, only the bare minimum, (mostly) keyboard controls and shell applications - half because i want to try new things and other half because it just looks pretty cool (look at any 'I3WM Rice').