Hmm, yeah. In 2008, my senior thesis advisor was the one responsible for putting this idea in my head.
When I e-mailed him 18 months ago to tell him that I was going to apply for Fall 2013, he pulled a 180 on me and emphatically discouraged me from pursuing my PhD and a career in academics (declining financial state of higher education, dismal academic job market, heightened competition as many turn to higher education instead of the workforce in a bad economy, etc).
But when you get your heart set on something and decide that it's the only thing you want to do with your career and the next 40 years of your life, it's kinda hard to let that go.