As to Ubunutu- I've used it and Kubuntu. I'm a linux newb, and that's why I like those distros. It's like that baby-step one needs when migrating from Windows to, well, near any other Linux Distro.
Granted, I started out back in the days of MS-DOS so a command pompt is not quite a stranger to me. Just, it's been a while since I've used one and I've been rather spoiled by the GUI in Windows. Thus, Ubuntu and Kubuntus attraction.
Maybe someday I'll have another computer setup that can be soley Linux- that way I don't bork up my good Windows install.