I started with Ubuntu 12.04Alpha2, and found that the “Unity” desktop crap was all they supported.
I test drove Arch, but I didn’t like the whole “rolling distro” idea to be a good idea. I want things to work, even if they are outdated. A rolling distro sounds like you are stuck in Beta all the time.
Then I tried Linux Mint, except the KDE flavor. This was almost right. There’s a default empty folder on the desktop for some reason with absolutely no explanation for why it’s there, except maybe it’s because they want to show off their “dare to be different” window controls. The “exciting” news is that they are on the side. This is obviously to show you that at KDE, they started with a blank sheet of paper. I can roll with the funky windowing system, but decided to ditch it when I could not make heads or tails out of the little icons and the KDE folk totally forgot to use “tool-tips”
I see no value in fighting my windowing manager. I have booted up recent versions of Puppy, BackTrack, and Parted Magic and had no issues moving around and trying all the widgets. Thus I’m not going to waste my time figuring out Unity or KDE. (If I _had_ to choose one or the other though, it would be KDE, but no praise for the second least sucky GUI.)
So now I’m giving Linux Mint 12 x64 with Gnome Classic the extended test drive. I’m dual booting with my older Ubuntu for the meanwhile.