Depends on the dog. They are definitely going to generally be dominant behavior because they are working/herding dogs. If they have plenty of exercise and sense of a "job" so to speak (my Malinois job is to wear out my other dog. She does a marvelous job of exhausting him every day), they aren't agressive when they shouldn't be. Very good guard dogs and have a good sense of "the regulars" that come by the house. Weird about new people but calms down quickly. Mostly just excessive energy instead of malicious intent. Stella sounds like she wants to kill you, but she's literally so fucking excited to meet another human she can't stop herself from making loud noises.