Especially in EM, in which each day is a whole new suprise.
Yesterday was an awesome day. Evaluated a bunch of trauma, got to flirt with some hot patients (which NEVER happens at my hospital), broke an SVT and got my boy set up for ablation, caught an ascending cholangitis early, splinted, tapped a joint. Found the use for rectal in altered mental status (found drugs in his butt).
I've had days that SUCKED. Hopeless social cases requiring endless work for no reward, arguing with consultants over admissions, missing diagnoses (I missed a pneumonia the other day. With rales. How can you miss that?), arguing with neurotic patients and family. Chasing after lazy nurses to get tests done.
Overall, getting towards the tail end of residency, I think it's starting to become worth it. I don't regret not becoming a cardiologist or neurosurgeon. They work their tails off and deserve every penny of their incredible salaries. I do work in a free clinic with an FP and I see how her patients LOVE her and she LOVES them. I miss that about primary care, and you'll never really get that in EM.