The study of patterns in personality structure reveals three replicable prototypes: Resilients, Overcontrollers, and Undercontrollers. The three prototypes were first identified in children using ratings based on the California Child Q-set (see Block, 1971). Only recently, the three prototypes were replicated in self-reports on questionnaires intended to assess the Big Five (see e.g. Asendorpf, Borkenau, Ostendorf, & van Aken, 2001). This paper addresses the question of whether the three prototypes are replicable across different data sources. Cluster structures in self-, peer, and behaviour ratings, all based on the Big Five, were examined in a sample of 600 monozygotic and dizygotic twins ranging in age from 18 to 70 years. The three prototypes could be clearly identified in the self-reports only, whereas in ratings by others only the Resilient prototype could be replicated. In both peer and behaviour ratings, the second and the third cluster reflected a Non-desirable and an Average type. The analysis of cross-data consistency revealed only moderate agreement in assignments of individual subjects to types. The findings suggest that personality types depend strongly on personality measures and informants. Copyright © 2003 John Wiley & Sons, Ltd.