I can tell you about the one I had, but I don't have any experience with others, so I don't know how well it will describe the actual breed.
She was not from working lines, and she was well-socialized. She got along well with other dogs. She had fairly strong protective instincts. And let me tell you, if you meant me harm, she was very intimidating, despite being on the smaller side.
She didn't take a whole lot of exercise. She was very calm in the house, and a long walk and a good game of fetch or tug was sufficient. She learned pretty quickly, but she had a stubborn streak.