Rolf Degen summaring... Although "nice" personality traits are beneficial in many areas of life, there is no correlation with physical health or career success

Agreeableness and Its Consequences: A Quantitative Review of Meta-Analytic Findings. Michael P. Wilmot, Deniz S. Ones. Personality and Social Psychology Review, February 28, 2022. https://doi.org/10.1177/10888683211073007

Abstract: Agreeableness impacts people and real-world outcomes. In the most comprehensive quantitative review to date, we summarize results from 142 meta-analyses reporting effects for 275 variables, which represent N > 1.9 million participants from k > 3,900 studies. Arranging variables by their content and type, we use an organizational framework of 16 conceptual categories that presents a detailed account of Agreeableness’ external relations. Overall, the trait has effects in a desirable direction for 93% of variables (grand mean ˉρM=.16). We also review lower order trait evidence for 42 variables from 20 meta-analyses. Using these empirical findings, in tandem with existing theory, we synthesize eight general themes that describe Agreeableness’ characteristic functioning across variables: self-transcendence, contentment, relational investment, teamworking, work investment, lower results emphasis, social norm orientation, and social integration. We conclude by discussing potential boundary conditions of findings, contributions and limitations of our review, and future research directions.

Keywords: agreeableness, personality, meta-analysis, second-order meta-analysis, consequences, Big Five, HEXACO