If you are fairly skilled, they are the best dogs to work and are easily trained. If you are like most owners, they get reinforced, although you think you have reprimanded them, and their behavior gets worse. If you are battered and bruised then this personality is probably the reason why. There are two to mention here. Aggressive, although I don't consider this to be a personality trait, and Abnormal.
Aggression tends to be a problem encountered in certain breeds more than others.
Pure psychotic aggression, in my opinion, cannot. Always seek professional help with aggression. Abnormality seems to be psychological. The animals I have seen seem to be almost autistic. Some dogs are non-responsive, while others just seem depressed.