I am learning sculpt mode and the best way to see the results is by switching from flat to smooth shading in object mode, but the best way to see geometry of what i am doing is best viewed with flat shading. Is there a hot key to toggle flat or smooth shading without having to switch from object to sculpt mode each time?
Only way I know is press your space bar and look for flat and click on shade flat while in sculpt mode. Do the same for switching to smooth.
Hope this helps :)
Using the shift key will cause some sculpt brushes to smooth.