This narrative review is a brief summary of 25 papers on extraversion research. Positive psychological and behavioral effects have been addressed in this current literature including trust, group work satisfaction, leadership, popularity, well-being, online interactions, less Internet addiction, less problematic gaming, and mental health literacy. At least two positive physical effects have been addressed including that extraverted individuals have lower blood pressure and lower cardiovascular reactivity. Negative psychological and behavioral effects have been noted for extraversion including less listening, risk-taking, substance use, drink – driving, depression, and suicidal ideation. Methodological limitations include the frequent sampling of students thereby limiting generalizability and the cross-sectional data that limits any directionality or causality conclusions.