I had Ubuntu 8.04, I wiped it out, I installed Ubuntu Ultimate Edition (quite
impressively decorated), PC/OS Openworkstation (which did not recognize my photo
apparatus and some installed programs did not work on it but it is lightning
fast as compared to Ubuntu) and gOS (very interesting but only a toy or
something for somebody who does not use many programs, as I could not install
any programs on it with sudo aptitude install).
Now I have Hardy Heron, Ultimate Edition and Linux Mint. Maybe in a week or
two years I will again wipe my hard disk clean and install some of these and
others.