Ubuntu and Kubuntu do not come with Java JRE installed. Ever try installing JRE? I did it many times in old releases of Mandrake, and I prefer not needing to do so. Or installing HP printer drivers. Those were two big reasons I switched to PCLos. Lastly, last time I checked, Opera is lacking in the 'buntu repositories. So it comes down to usability: out of the box, which OS is more readily usable. In my case, it's PCLos without a doubt. I think I've tried all of the top ten and then some, and for the work that I do, if PCLos weren't available, I'd be using Mepis. Sabayon is too bloated.