wxWindows looks terrible

I'm just experimenting with wxPython coding with wxWindows on SuSE 9.0. However, my application looks awful. And it's not my code - the demo apps look awful too. The font is ugly (every font you pick looks just the same) and the general look and feel is terrible. Since wxWindows on Linux is based on gtk, I assume this is because my gtk installation isn't properly themed or set up. Does anyone know how to fix this? My desktop is KDE so I do not have Gnome installed, but I run gtk-based apps like Gimp and Eclipse and they look fine. Best wishes - Ken