I agree with Dr. Crispy, wholeheartedly. There isn't much point in going "all the way," if that final destination isn't actually one you want to reach. I chose PA partly because when I weigh the pros and cons, when I think about what and how I want to practice, in the end I don't care to make all the sacrifices it takes to be a physician. There are plenty of MDs who look back and wish they had made a similar call.
Shadow a working MD and a working PA, in similar settings. Then talk to four-year med students and PA students.