My Leo is a long stock coat, and has a pretty "soft" temperament, and tends to be a drama queen if anything upsets her (a bath or ear medicine, for example). I just chalked her temperament up to the fact that she is most likely a BYB dog.
My dog is a long stock coat and his temperament and drive are the exact same as his short stock coated half brother. We raised both of them so I know them well and there are no temperament differences attributed to the coat differences. He is extreme in many ways but due to breeding, not coat length. We train and compete in a variety of sports and he is also a house pet.
FG167, I secretly am IN LOVE with your dog. He is one of the most beautiful shepherds I have seen. Glad you have experienced two brothers with diff coats and they have the same temperament. I know my LC boy has just as much drive and what not as his siblings who are stock coated. Definitely depends more on the breeding than the coat length.
I love my long coated shepherd! This is my first GSD and I am in love with them. A lot of people at the dog park I go to ask me if she is mixed with Belgian Tervuren or Australian shepherd. Some of these people are GSD owners too so I get confused and wonder if maybe my dog isn't purebred. She doesn't have papers but her parents are GSD and I have gotten opinions from AKC judges about my dog and they say she looks like a GSD! They say there is a vast variation for breeds of dogs and sometimes they are not recognized for show purposes but that doesn't mean it is not a GSD