We had our first GSD before DD was born, and again - was advised to get rid of him before baby was born. He was perfect, very protective (sat on Midwives feet!) but totally soft. I used to lock him away when we hosted the Toddler coffeee mornings, but they all begged for him to be let out! He was part of the local GSD club & did training & agility shows, and visited the Primamry school in Pet week and had a whole school pet him.
He was sorely missed when we lst him after 11 years.
Latest GSD is my SN Dog - came from a bit of a puppy farn in hindsight, we should have run a mile, but DH saw a puppy and was hooked. He is fine with us, and regular visitors, but I don't trust him with strangers or small children. He is nervous so growls! Now he knows, when the door bell rings he barks and runs into the study where he is shut until guest leaves. No way would I let other kids try & pet him. Kids friends ask if I can let him out - NO. Actually, DD's boyfriend has been visiting so long he is now treated like family by the dog.
He drives me mad, but he is ours and we couldn't get rid as he would growl at anyone new & be put down, so we have learned how to manage him.
Talking to a Guide Dog trainer, they said that not many GSD's make it a guide Dogs as they are "one-man dogs" and don't like the move from puppy walker to new owner etc, but those that DO make it are considered the Porsche compared to the Labrador Fords