As a fellow vet, absolutely don't try to chase the adrenaline rush you had when you I served. I promise you, nothin compares to it. My service was exciting, and the relationships I formed with others were stronger than any I've formed or ever will form. But that's just it. It's temporary. You have to find another purpose, and learn to define yourself in ways that are detached from the military. I've had too many friends who couldn't do that and ended up lonely, miserable and angry. I am getting into nursing for most of the reasons you mentioned, but technical expertise is what I'd rather attain. There's tons of interesting things about most of the nursing specialties if you are genuinely interested in medicine. If you aren't, don't do it. Most of the students I go to school with either do it because it pays well, or because they want to work in the ER/ICU. They already hate nursing and they haven't even started their first jobs. Good luck if you do attend school anyway.