Black dogs tend to be last to be adopted (same with black cats) simply due to superstition, from what I can tell. So sad :/ I've always been drawn to black animals.
They've actually done studies on this phenomenon, and it seems that animals with black faces are harder to read; they appear less expressive to the average person. At worst, they appear a bit scary, as the average person doesn't know what a black dog is thinking. With cats, black ones seem more plain to people, I don't know if superstition plays into it or not.
I've always loved black animals as well, from cats to dogs to horses to ducks. At the moment, I only have one black cat, but I've had at least one black cat in my household for the past 20-odd years. And ironically, I had a flock of 7 white goats, five white geese and a big white dog... a friend of ours jokingly accused us of having some kind of "***********" thing going on over here, with this mob of white animals in the pasture. :crazy: I didn't choose them for color, it just sort of turned out that way.
Anyway, back to the OP... Doberman--not a good choice. They have a LOT of health issues and are not long-lived; they are usually aloof with strangers and appear scary to some people. I love 'em, but I don't think I could take the heartbreak of owning one... every Dobie I know has not lived past 8 years of age. Some kind of cancer or heart defect always gets them.
Vizsla, Weimeraner--WAY too hyper.
I would suggest one of the Northern breeds, Husky, Malamute, Samoyed, etc. but they are NOT biddable and tend to be runners. Same with any type of sighthound--Greyhound, Whippet, Saluki. Neat dogs, but not an off-leash type dog.
I have heard good things about this new breed that is a mix of GSD and Nordic breeds--at the moment I cannot remember the name--but they are bred to look like a wolf, with the friendly nature of the Northern breeds, and the biddability of the GSD. From what I understand, no actual wolf blood was used, although I've heard some people say that wolf blood exists in one of the foundation breeds used in the mix. Who knows? It's a breed I would have been very interested in when I was younger.