I've been a KDE user since KDE1 and I think, despite its flaws, it's still better than Gnome. I personally like the deep configurability, love the keybindings, WM tweakability, and so on. I'm not a huge fan of Plasma but think they made the right decision by building an architecture that would allow them to use the same components to build tablet, desktop, and other interfaces. I don't use any of the widgets though - don't find them useful. And I dislike Nepomuk and Akonadi, at least in their current form. I want to love Kontact but at least in SUSE 12.3 it still falls short of the mark. But I think this desktop is headed in the right direction and it's always the default I install first!