[Solved] The surface of the device and heat sink may look perfectly flat to the naked eye. Personality Systems: The organized set of characteristics and behaviors that makes a person unique and influences their interactions with the environment. Big Five Personality Traits: A model that describes human personality using five broad dimensions: openness, conscientiousness, extraversion, agreeableness, and neuroticism. Temperaments: Inherent personality traits that significantly influence an individual's behavior and interactions from an early age. Physiological Dispositions: Inherent tendencies or characteristics in an individual's biological functioning that influence their behavior or responses to certain stimuli.