From siblings to parents and partners to coworkers, each one of us expresses a unique emotional signature–the individual collection of traits that characterize our personality. If given the choice, some parents might prefer to cozy-up with a good book on Saturday night, while others would rather dance the night away. One child might spend an entire afternoon constructing a Lego masterpiece while another flits from one enticing diversion to the next. From Myers-Briggs to the …