Ubuntu. It may not be the greatest distro, but it's polished enough for end-users. The default Gnome interface might be different than what you're used to, bu

Ubuntu. It may not be the greatest distro, but it's polished enough for end-users. The default Gnome interface might be different than what you're used to, but I don't think it'll take too long to get used to it. Fedora is also an excellent distro. I personally use Fedora.