3 stars. Definitely interesting for someone already intrigued by personality types (like me, the INFJ), but would probably be dense or dry for someone just dipping their toe in. Also a bit funny at times given that it was written in the 80s so it's pointedly dated in some respects (though I can appreciate their efforts here and there to go against the stereotypical grain and acknowledge that many societal perceptions of masculinity and femininity are performative and not necessarily real).