Good engineers' poor personal skill is often a manifestation of traits that allow them to be good engineers in the first place (though not a necessary condition). The same way Steve Jobs and James Cameron are horrible bosses to work for, the same way CEOs often suffer from ADD and bi-polar disorder, and the same way so many amazing Nobel Laureate have autism problems. If you appear ordinary in your personalities and traits, then chances are that you aren't the outstanding leader of your field.