There are three dog temperament groups: Assertive/Aggressive, Neutral, and Passive.
An assertive/aggressive dog typically has a high prey drive that has nothing to do with size or sex. Often small female dogs are the most assertive/aggressive.
Neutral dogs have a medium prey drive and exceptional coping skills. They are self-confident and enjoy interacting with other dogs.
Passive dogs have low self-confidence and few coping skills. They have little to no pretty drive. Submissive dogs would rather sit with you or be alone rather than other dogs.