The Rottweiler is basically a calm, confident and courageous dog with a self-assured aloofness that does not lend itself to immediate and indiscriminate friendships. A Rottweiler is self-confident and responds quietly and with a wait-and-see attitude to influences in his environment. He has an inherent desire to protect home and family, and is an intelligent dog of extreme hardness and adaptability with a strong willingness to work, making him especially suited as a companion, guardian and general all-purpose dog.
The behavior of the Rottweiler in the show ring should be controlled, willing and adaptable, trained to submit to examination of mouth, testicles, etc. An aloof or reserved dog should not be penalized, as this reflects the accepted character of the breed. An aggressive or belligerent attitude towards other dogs should not be faulted. [AKC.org]