I've used Ubuntu for a while for my main Linux box, but for some reason Oneiric Ocelot had refused to install on my son's cheap eMachines, so I used Linux Mint for his. It's been OK. It seems simpler than Ubuntu, but the real improvement came when I ended up switching to Cinnamon desktop. I liked Cinnamon so much I ended up switching to it on my Ubuntu box. Alas, it seems the days of Gnome might be over?