It's not always so easy, it turns out, to identify your core personal projects. And it can be especially tough for introverts, who have spent so much of their lives conforming to extroverted norms that by the time they choose a career, or a calling, it feels perfectly normal to ignore their own preferences. They may be uncomfortable in law school or nursing school or in the marketing department, but no more so than they were back in middle school or summer camp.