Nope, I follow UI toolkits pretty closely and always try to find a native app for a given task first and foremost. After that QT is the second best option, GTK somewhat worse, and Swing and other monstrocities to be avoided at all costs.
It's not subtle either, these things always stick like sore thumbs -- only exception are some that only use very basic widgets and delegate 90% of the work to native ones (like native file open dialogs etc).
