openSuSe 10.3. They really came a long way from SuSe 10.0, which was, if memory serves, the first distro I ever tried.
I installed via the KDE download CD and everything went smoothly, installing graphics card drivers was a piece of cake with their Support Database website. Installing pretty much everything was easy, which was not the case in 10.0 where you ended up in a dependency hell by trying to install just about anything.
I like YAST, I like sysinfo:/, I like that it's fast and boots pretty fast. I'm gonna keep it untill the new Sabayon comes out.