That's funny, cuz most GS are stubborn - a good thing. They are highly intelligent and stubborn and thus usually somewhat tough to train (contrary to popular belief). They largely want to do things their way unless you make it clear you're boss. I had somewhat stubborn dog in training - she was definitely a dominant dog - but by God when you got it thru to her, she obeyed and *stubbornly* stuck to her lessons like the dickens! She even self-disciplined where I didn't have to tell her to heel - she did it herself when seeing dogs and the like.
Unlike the not-so-hot GS I have now! :-\