I’m in the opposite situation. I started on KDE but moved to GNOME. I sometimes think about moving back to KDE but I do love the design consistency of GNOME. KDE’s endless theming is great, but I only ever used the default them because I’d notice little inconsistencies otherwise. I’ll probably be on KDE Plasma 6 though, because I tend to jump ship to the shiny new thing that will solve all my problems.