Actually, the friendlier and more confident your puppy is, the better. It shows good judgement. It does not help to have a guard dog that bites everyone. It is much better to have a dog that is confident and friendly. Such a dog will be much less likely to bite someone who is not a threat. And such a dog can be safely worked in protection and bitework, etc. A dog that is out barking and lunging at everything is much more likely to run when someone yells loudly at it or kicks or clubs it, because that dog is not confident and fearful.
Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.