The most proven scientific analysis of personality traits is known as the “Big Five,” which breaks them down into five spectrums of behavior. Openness to experience: from curious and inventive on one end to cautious and consistent on the other. Conscientiousness: organized and efficient to easygoing and spontaneous. Extroversion: outgoing and energetic to solitary and reserved (you likely know them as extroverts vs. introverts). Agreeableness: friendly and compassionate to challenging and detached. Neuroticism: anxious and sensitive to confident, calm, and stable.