Passive aggressive people learned anger is not an acceptable emotion. They grew up with parents who controlled them and denied their feelings. As adults they let these feelings out in backhanded ways.
Everyone has a personality, and this distinguishes us from other people. Personalities make us unique, reflect our needs, our behavior, and influence our actions, reactions, thoughts, and behavior.
Personality is a complex topic and huge topic that intrigues many. We define ourselves and others by using words which describe the traits & characteristics that make up our preferences & behavior.