Switched to Fedora 14, from Sabayon Linux. Fedora is, i think, the perfect combination of functionality, performance and ease of installation. The installer (Anaconda; supposedly the same installer Sabayon uses, except in Fedora it actually works...) even let me partition my three disks into a couple raid-arrays; one for the root filesystem and one for swap space. And it did it without flinching, bombing out halfway through, or spontaneously rebooting!
It's almost as well-polished as Ubuntu. Totem (Movie Player for Gnome) searches for uninstalled codecs and finds them if they're available... It's really well put-together; then again, Red Hat always used to be, so no surprise there.