In your opinion, what is the best way to create gui in Windows with python ? 
Do you recommend PyQt for windows?
I prefer PyQt, there is some examples in the pyqt release directory, you can try it out. I think the effect is really cool.
I  haven't tried other library so i could not compare PyQt with others . As I am familiar with Qt, the coding experience is very easy if you switch Qt to PyQt.
Your best library for create GUI with Python (PyQt, PyGTK, wxPython, IronPython, etc)