Amen to this. A stickler for me personally is the universal menu bar at the top of the screen rather than separate menu bars inside windows.

I know that older versions of KDE could be configured to do this, but not sure if more recent ones can do it, or if other DEs can do it. Every now and then I do some research on it, but the results are never promising. (From what I remember, the Ubuntu/Unity bar gets close but still feels weird.)