Research on the genetics of Psychiatric, Neurologic, and Behavioral (PNB) phenotypes reveals a panorama of complexity that creates several challenges: 1) the data are difficult for clinicians to assimilate and integrate into their practices, and even more so for patients and other members of society to understand and use; 2) because the traits investigated by PNB geneticists often have significance for our self-perceptions, new data can challenge our self-images in fundamental ways.