Comparing gtk+ and Qt applications
I've been on the hunt for Qt/KDE applications that do the job of the gtk+ equivalents I use.
That's a tall order, as I'm used to the way my gtk+ applications look, feel, and behave in Xfce. Trying to learn something that may do things completely differently can be very frustrating. Heck, it can be annoying even when 98% of the time the app does just what you want it to. That last 2% can push you over the edge.
Part of learning the ropes with KDE4 is finding which application does what. Yes, I could just keep using all my existing gtk+ applications with little or no difference in look'n'feel, thanks to QtCurve. But that would deprive me of the chance to try out the many, many other apps available in the FOSS world. I'd miss out on all the fun if I focused on applications written for just one toolkit.