Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
I don't want to be negative, but Ubuntu just doesn't cut the souce with me. When people ask why I don't use Ubuntu, I can come up with many reasons. I've decided to list them here and then perhaps the Ubuntu community can address them within the Ubuntu and related distributions, and win me over. But, I don't expect hat will happen since I am so happy with Debian Sid as it is.
Over all, I want to express that this saddens me. I'd love to see more Linux on the desktop, but I really don't want to suggest to people that Ubuntu is the way to go. I feel that KDE has more going for it and that Ubuntu has too many problems. Of course, I am just one person, but here are my main grips with Ubuntu.
(1) Ubuntu packages aren't compatible with Debian yet are called '.deb packages' — makes it very painful to find a Debian package some times, and it's not useful for new users to have two distro packages that are named the same but incompatible. Yes, Red Hat, Fedora, SuSE, and OpenSuse (and others, I am sure) all use the .rpm format, but they have this same issue and that doesn't make it OK. Please, rename your packages .ubu or keep them compatible.
(2) I really dislike Gnome desktop