my cousin has a GSD and they make great pets. even though the first time we visited to see him, he pinned my little brother to the wall and started licking his face, he's really sweet
my firend also recently bought a GSD pup and i think she's doing fine with him. obviously dogs like this will need a little work to do to be happy, but i don't think it can *really* affect them...well, what do i know