Again, the nice part of Ubuntu is that you can easily put the Gnome
desktop on Ubuntu if you don't like Unity. Try that with Metro.
I installed Ubuntu 12.04 on one of my machines and put the Gnome
classic desktop on it. During beta testing, I put XFCE4 and
the KDE phasma on Ubuntu 12.04. I don't know if you can still put
those on but I suspect that you still can.