Think about how your attendings are. Is that what you want to do for rest of your life? Not the residents, not other sub-i, not your classmates.
I see you’ve considered IM/PMR/FM/peds. Think back, do these attendings strike you as the people that you enjoy hanging out with in and out of hospital? There are personalities for each speciality. Most Anesthesiologists are happy and social people, but don’t mind being alone from time to time.
If you need constant people or patient interactions, anesthesia may not be for you. After all, abc of anesthesia, for good and bad, is the stereotype. airway, book, chair.
If you need someone to talk about the management and/or need time to contemplate your every differentials, Anestheia may not be for you.
If you cannot imagine not to have continuity of care for your patients, anesthesia may not be for you.
If you are not okay with no one ever appreciate what you do daily, Anestheia may not be for you.