Board Thread:General Discussion/@comment-26873003-20150815171419/@comment-26871105-20150817135606

Jotaro's personally is actually an existing personality trait. Assuming if the enneagram categorisation holds any weight, Jotaro's personality would be what they call 8w9 in that system.

Which essentially, 8w9 is a type of person who is born violent and aggressive in nature but has learned to stay cool and practical, and that's the Jotaro who know. Star Platium often represents Jotaro's violent and straightforward nature, while himself drifts between aggression and thinking persona depends on the circumstance.

Hence I wouldn't say Jotaro's personality is unrelatable or being overly unrealistic considering it's an identified personality trait.

But hey, maybe enneagram is just utterly bull shit, we don't know.