Ah, looks like I got some laughs from my comment. Sorry if anyone took me seriously. What I said is a common misconception about the GSD.
I hear you guys with the macho thing and the dog pulling the handler down the street. But its not just a man thing. My experience with this kind of dog was a woman being pulled down the street by a boxer looking mix, a big handsome guy but obviously not trained at all on the lead. Gunnar was about 6 months old and he started to bark at the other dog, and she comments "Oh, he's a tough guy", insinuating her dog was tougher (which he was- he was full grown and about 80-90lbs). I thought to myself, well, at least my dog knows how to walk on a leash and isn't pulling me all over the place!
Once again, to clarify, here is a dog that will rip out your throat if you turn your back on him: