I don't know. I'd have to really think about it. Maybe Endo. I dunno, something super chill, where I could become a master of my domain. I realize now that my medical student assessment was all wrong. I had thought EM was fun because of all the variety and fast pace, and Endo was mind-numbingly boring: to me, it seemed like Endo really only focused on five diseases--or maybe even just diabetes--how boring! But now I realize that enjoyment as an attending may not come from pathology, acuity, variety or volume. Rather, it comes from the patient-physician interaction, the clinical encounter. So, I'd rather be a dentist or an endo doctor, who sees a patient in the clinic for something, and then enjoy that patient-physician interaction, i.e. "how's it going? how are the kids? etc." rather than take any enjoyment from how sick patients are.
I'd appreciate being the master of my domain, knowing those few disease states inside out...instead of constantly having to look things up or consult for help.
Additionally, now I realized I was a fool for not liking the 9-5 schedule and thinking that EM would be better, ha!
I don't know if it would be Endo I'd pick... I'm not sure. But something where I could have all the things above, and especially one where I wouldn't feel nervous the night before or in the parking lot before coming to work.