LOL, well, my current - BAD character - GS loves every1! Not a good guard dog or rep of the breed.
My beloved dog from years ago WAS a proper guard w/excellent temperament & character. Flawless. She always, always properly barked and acted ready to tear you up if you were a "stranger". Even if you were my sister, or friend, or cleaning lady (latter she probably knew the best). However, if she knew you, you just had to reassure her by calling her name and going to her. Then she'd "remember" and let you alone.
When she was old, still the guard, a co-worker helped me move. As he stated - "Scary as hell when you went to the place. Then after meeting you and being accepted (thanks to yours truly), she was the NICEST dog!" Yup, she gave him a toy to throw and everything.
But if he came back, esp. by himself - she'd show she means business!
The best GS are incomparable to any other dog. Period. Too bad there are so many worsts.
You know, when you think a word, a picture usually comes into your mind.
The picture in my mind that always pops up with "dog" is a German Shepherd.