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Background --- Medical school admissions shape the physician workforce. Norway admits students exclusively by GPA. With no selection for suitability and professional attitude, combined with free education and low attrition, the admitted cohorts are largely shaped by who chooses to apply. To explore this effect, we characterised personality traits of medical students at the University of Oslo and compared them with the Norwegian population and published samples from medical schools in other countries. --- Summary of Work --- Newly admitted medical students (2022–2025; mean age 22.1, 67% female) completed the BFI-20S (four cohorts, n=436, 91% response) and the MBTI (five cohorts, n=532, 95% response) personality tests. BFI measured Agreeableness, Conscientiousness, Extraversion, Neuroticism, and Openness. One-sample t-tests compared mean scores with Norwegian workers (n=6,372). MBTI classified respondents on four dichotomies combined into 16 personality types. Chi-squared tests compared distributions between U.S. (n=83) and South Korean (n=171) medical students and the Norwegian general population (n=159,468). --- Summary of Results --- On the BFI, Norwegian medical students scored higher on Agreeableness, mean 23.9 (SD=3.0), Conscientiousness, 22.7 (3.6); Extraversion, 20.3 (5.9); Openness, 18.7 (4.7), and Neuroticism, 13.0 (4.8), than general Norwegian workers (22.2, SD=3.4; 20.5, SD=3.6; 19.0 SD=4.8; 17.8 SD=4.7; 12.0, SD=4.5, respectively, p<0.001). Female students reported higher Neuroticism (Pearson’s r=0.2, p<0.001) and Agreeableness (r=0.1, p=0.010) than male students. --- MBTI classified most medical students as Extraverted (69%), Intuitive (58%), Feeling (67%), and Judging (78%). The ENFJ type (Protagonist, 21%) was significantly overrepresented compared with U.S. (2%) and South Korean (3%) medical students, and the Norwegian population (6%) (p<0.001). The most common types among women were ENFJ/ESFJ (27%/14%); among men, ENTJ/INTJ (26%/13%). ---Discussion and Conclusion --- The Norwegian admission system is associated with elevated levels of Conscientiousness and Agreeableness and large overrepresentations of ENFJ/ENTJ. Although these traits and types can be well-suited for medical practice, limited diversity in perspective, leadership styles, and coping strategies might have implications for the composition of the physician workforce and patient care. --- Take-home Message(s) --- The Norwegian GPA-only admission model is associated with a distinct and narrow spectrum of personalities, with potential implications for physician well-being, leadership representation, and personality diversity.