If you are brilliant, ambitious and gifted in science, you may consider becoming a doctor. If so, think twice. According to a new survey by personal finance site NerdWallet, most doctors are dissatisfied with the job, and less than half would choose a career in medicine if they were able to do it all over again. There are many reasons for the dissatisfaction, said Christina Lamontagne, vice president of health at NerdWallet. Most doctors enter the field thinking they'll be able to spend most of their time healing the sick. Yet the paperwork burden on doctors has become crushing, and could become even more complicated under the Affordable Care Act.