It only let me vote once, but here is some info on the one I voted with:
Only one of mine has a pedigree. There is a big chunk of Sch3 dogs, one of whom is well known and common in many pedigrees (his name is Grief) right outside his papers. So about 4-5 generations back. Those are the only titled dogs anywhere in his pedigree.
It looks like somebody a long time ago took the most crap puppy from an otherwise lovely looking breeding and then that dog became my dogs great grandsire or great great grandsire. I can't remember which. All the other dogs are meh, with stupid pet line type names. No health certs or titles.
He has multiple health issues common to the breed. He is a bit of an example of how not to produce GSDs.
As far as temperament goes...
I have to give him some credit. I have only ever seen him scared of something TWICE. His first one is the vet, and considering his health record, I can't blame him. He just tries to escape the hospital itself, but is otherwise OK. His other spook was at the ocean, of all things. I brought him to a beach, and he just went NOPE! as soon as he saw it (within about 30 feet of the water line).
He also has shown nerve issues towards weed whackers, vacuum cleaners, lawn mowers...He tries to attack them if allowed. Not the vacuum cleaner anymore (I worked with him on it. He doesn't care about it anymore). But the yard stuff? Must. Destroy.
Worth mentioning as well: I had a guest at my house who invited another guest, who we both had mistakenly thought my dog had met before. He had not. When this guest walked into my house (this is a man who was well over 6' tall and 250lbs), my dog immediately blocked him into our entryway. He held him in place by barking and standing his ground, not allowing this person to move. My dog was apparently scared, because there was anal gland funk on my floor. As soon as I rushed up to grab him and apologize profusely, he let me lead him away, but kept an eye on the guy until it was more obvious he was a friend of ours. Then he was all smiles and tail wagging. I am very thankful no biting was involved(no hard feelings either from our friend although it terrified him). I'm still on the fence with what this means.
Also, me and my dogs were attacked by 3 loose ones one time. After fighting off the 3 large other dogs, my 2 GSDs happily greeting the owner, who rushed over to talk to me after he put his dogs up. I was still a bit in shock at the time, and he came up and started petting my dogs - the same ones who were just in a brawl with his dogs. As in literally 30 seconds beforehand. I was very proud of them both!