If someone says a particular type fits them well, that helps you understand them quickly. And if they say the type they get doesn't describe them, then you don't need to use that information.
"McCarley and Carskadon (1983) replicated these findings and demonstrated that across a 5-week test-retest interval, 50% of the participants received a different classification on one or more of the scales."
https://www.researchgate.net/publication/232494957_Cautionar...
I don't think it has much value beyond some sort of throwaway catalyst for conversation.