Sparky x64 MATE
Started with openSUSE way back in 2006 and loathed KDE. Looked around and found LinuxMint with Gnome2. When that was abandoned found MATE, which has improved enormously since its initial release. Tried Cinnamon, Fluxbox, OpenBox, and JWM. They each have their advantages but overall MATE is still my favourite. Hadn't heard of CDE, so will have a look at it in a few moments.