If you could be excited about being a radiation therapist, then you are making a horrible mistake going to med school. Be happy, find a spouse who also works, and enjoy the dual income lifestyle. Most people who go to med school have different job descriptions in mind, and wouldn't be satisfied with this. If you want to practice medicine go into medicine. If you get off on the additional knowledge, challenge, etc. go into medicine. If you are satisfied with the supporting, therapist role, be a therapist. The key is to know yourself and what would make you happy for the many hours per week you will be spending your life (money won't).