Coming out of the very famous University of Cambridge Psychometrics Centre is ApplyMagicSauce, a battery of scientifically robust predictive algorithms that analyse your online behaviour to predict your psychodemographic profile. Check it out, it might be fun to see how others see you.
https://www.psychometrics.cam.ac.uk/productsservices/apply-magic-sauce
https://www.psychometrics.cam.ac.uk/productsservices/apply-magic-sauce