I knew I would never do primary care the first day of my cardiology rotation. I had just finished a family medicine rotation that treated medical students like interns, and it was overwhelming. All the things that group theory mentions, they want refills for meds for 5 chronic conditions, they have DM and HTN which you need to check their numbers, plus 4 chief complaints (i'm having back pain, i get this weird chest pain, I have headaches, oh and I'm constipated). And we'd have 20 minutes to talk to them and write the note, then we'd present to the attending. I felt like I was running a sprint all day long.
Then I go to cards. New consult, atypical chest pain. 10 minutes to make some small talk, get to know them, do a leisurely review of systems, review their history, and a PE. Present to attending: plan stress and echo. Wam bam thank you next. It was like night and day. 10 minutes of work in a 15 minute slot vs 90 minutes of work in 20 minutes. And hilariously the attendings in both were across the board billing mostly level 4's. Not to mention what I was insulated from as a student -- the FM attending would be bombarded all day long with telephone messages refill requests lab results referral requests letters from specialists disability paperwork DME paperwork etc it was nuts. All the cards attendings would do is read echos, vascular u/s, holters, and stress tests in their down time, so more RVU's. Plus everyone would get annual EKG's and new consults would all get EKG's so more RVU's there too.
Anyway I'm applying IM and I enjoy the challenge of primary care. But there's no way I'd sign up for a lifetime of that when I can be a subspecialist and make more doing less.