Stress
For the most part, you'll hang up your stress at the end of the day with your robe. However, it's also possible that you'll run into those you've seen in the courtroom in the real world. You're also constantly making decisions every day that impact the lives of others. That can be a major source of stress.
The upside? You have the law behind you. While others make tough decisions in their careers without having a tangible set of rules to show as the basis for their decisions, you will always have the law. It might not make you popular with those who find fault in the system, but at least it helps make your job relatively black and white.