Got my own house, my girlfriend and I, and I'm looking for a puppy. I work a lot so I'm thinking of maybe a little guy that will grow up and be the houses protector when I'm not around. I was thinking a Rottweiler or Doberman.... Or German Shepard I guess. Any thoughts? Other similar, large dog breed that might be intimidating, but not quite the level of a pit bull? I have no intention of the dog being mean, I would just like for him to let people that aren't welcome in my home know about it ahead of time.