In February, I worked my last shift as an ER doctor. I walked out the front door that morning after an overnight shift and felt nothing. It wasn’t bittersweet. One month later, I feel nothing but relieved. Not even a twinge of regret or nostalgia. How could this be? I spent 12 years and acquired hundreds of thousands in debt to do this thing, and now I’m walking away? When people ask superficially, I offer simple explanations. Too much adrenaline, not a sustainable career. Too much antagonism between departments, the arrogant and egotistical specialists. Too much tragedy, death and dying …