Raider said:
Dobermans are the ones that I am most familiar with and one of the breeds most feared. The animals are highly intelligent, loyal to a fault and extremely good natured if you get one thats not nervous or too much inbred.
The females are pretty easy going but the males are highly aggressive - testosterone on four feet. A person has to be able to understand the animals thought processes in order to have their respect and command them. Most people aren't able to do that with a large dog, much less a small one.
Another thing to consider is that large, aggressive dogs are, well, large and aggressive. They think of your family as their pack, and they WILL challenge who they see as the Alpha for control. Like you said, you have to get into their head. You have to handle it like an Alpha dog would, not like a human would, which usually means you have to be pretty hard on them at first until they learn to back down. 1st step in training a dog is to be smarter than the dog.
I think most people with large/aggressive breeds are just too lazy to train them properly. You have to be consistant, something that gets them punished once, has to get them punished every time. Otherwise the dog will not only keep doing it, but will learn to not trust you, which leads to them disobeying you out of hand. I've seen people literally owned by their dogs because they were too lazy to train the dog, so they just gave in to the dog's demands, hence the dog trained them. Which leads us to:
Each dog and family is different. Circumstances and the owner's preference dictate the breed of dog. One of the bad things is that there are so many people who have pit bulls, rottweilers etc who can't control their own dog or just let it run free. These are the people who shouldn't have dogs.
To which I agree.
In my case, my dog is a biter. German shepherd/Mastiff/wolf mix. He's very intelligent (a little too intelligent for his own good) and very aggressive. I however, have no kids, the yard is fenced, gated and posted. I trained him to NOT bite me, but never curbed his aggressiveness towards unwanted guests. If I go to the gate and lead them in, he's fine with it. If they just come in, he makes all kinds of noise, but will generally stand on the porch barking at them. He only goes into attack mode if they start throwing stuff at him (like the stupid neighbor's kid did when he came over on his 16th birthday wanting to borrow my Camaro

), or if they try to come in the house. I'm just fine with that arrangement.