I have personnaly nothing against neither Gtk+* nor Qt, as long as 
I don't need to write an appli using them. I'm a happy user of Gtk-based 
Xfce4 and Qt-based wpa-gui.

     Steve expressed reluctance against Qt, for its footprint, I think. 
The issue with Gtk is that it is part of Gnome and Gnome is becoming 
more and more entangled with Systemd.

     Regarding writing an appli, I can only tell it's easy with Xforms. 
I read day after day the efforts of Edward and Aitor with Gtk; but the 
result will certainly be more shiny than with Xforms.

     Didier