1. GNU Free = GNU GLP and compatible really free licences according to the
Free Software Foundation. Freedom according to GNU Licenses.
2.In my opinion, the DE should be the most attractive and usefull possible.
And then, let the user to EASILY change from one to another. I saw some
distributions that allow to choose Gnome, XFCE or KDE from the Login Screen.
3. There should be a web or something that allow users to choose all the
Themes(GNU free) that everyone desire, easily. Choose Themes like Icecat
Extensions.
Theme= Windows + 'GTK+' + Icons + Cursor