Doberman Pinschers are incredibly smart, athletic, powerful dogs. They almost demand leadership and exercise, being some of the most effective working or service dogs around. They are easy to train, as they love to please their master, but will not take orders from someone they believe to be mentally weak. If so, they will become unruly and destructive, thinking they are top dog. While they may have a reputation for aggression, this cannot be further from the truth. They may be massive, tenacious dogs, but they have no more preternatural tendencies for violence than any sweet dog you know.
The Doberman Pinscher, despite being thought of as always being a black and tan dog, can also be found in red, blue, and fawn, although they always have some semblance of the tan markings.