Working in a hospital, you also get a really good look at what happens to the body of someone who's followed the herd diet and exercise-wise.
Don't ever take what you see in the hospital as "normal." Be very sensitive to how being in that environment can affect your outlook/expectations. You probably already know this, but I made a conscious reminder to myself every day that I worked with patients that THIS IS NOT NORMAL, THIS IS NOT HOW I CHOOSE TO BE, AND I WILL DO EVERYTHING POSSIBLE TO STAY OUT OF THE HOSPITAL FOR AS LONG AS I LIVE. Be vigilant about your attitude, because it will creep in on you if you're not paying attention.
Moreover, most of the people who work in the health care industry aren't exactly glowing examples of "health." I've never seen so many pot lucks and meaningless celebrations (all involving junk food) in my life.
I worked as a phlebotomist through college and once I started taking the stairs, I started seeing some real improvement in quad definition, so it can definitely pay dividends. Just remember that you're not getting a ton of fuel so if you feel a bit weak, back off and take the elevator.