I tried out Fedora for a few minutes. The Gnome desktop looks just like Ubuntu. I'm going to do some research and see what the real differences are.

When I rebooted into Ubuntu, I had some upgrades to install, which I did. One of them popped up this message:

A security certificate which was automatically created for your local system needs to be replaced due to a flaw which renders it insecure. This will be done automatically.

If you don't know anything about this, you can safely ignore this message.

That's pretty awesome.