I dont like Ubuntu, actually ive only used Kubuntu, but i dont like it.
I prefer using the console most of them time, so i hate that i have to set the root passwd using sudo before i can su as root. Although i now understand their reasons for it, im not convinced (and dont have an understanding) if the security of using your user password with sudo to run root commands.
Adept is pretty shitty, they dont seem to have that many packages in their repository, i think theres 4000ish. In debian isnt there well over 10,000.
I don't really like these distrobutions that make you go with one Desktop environment, or window manager. I remember redhat back in the day with every window manager and desktop environment and i would switch between them regularly to see what theyre all about. With Ubuntu you are forced into Gnome, there is also Kubuntu i know, but thats still only two choices.
In Kubuntu they hid the freakin KDE control centre, and in its place have a horrible folder with a trim selection of settings to configure.
I think i would prefer Fedora over Ubuntu (Which i know also only has two choices of DE/WM but I like KDE the best anyway) for a desktop machine. And Debian for a server.
Maybe i'm just a linux user seeing this from a linux user point of view.