For the sake of good order, Carla Schroeder at LinuxToday has switched from (K)ubuntu to Lenny Read more here
But my first Linux love was Debian, and with the release of Lenny I have gone back.
Debian almost has it all. It has the largest package repository. It supports the largest number of hardware architectures. It is 100% non-commercial and community-driven. It aims to be 100% Free software, and it’s very close to that. In fact one of the reasons I stuck with Kubuntu for so long was it promised easier handling of the binary, proprietary NVidia drivers. But it never was all that easy, and with Hardy Heron the only reliable installation method was old-fashioned manual installation.