Ms4 here. Story time, so get ready (this is LONG).
For the majority of my life as a kid up until high school I wanted to do something completely different. Medicine was out of the question. But throughout school I'd always had an interest in biology (just because), and I found that I enjoyed studying it. My dad, an interventional cardiologist, always wanted me to become a doctor too (never forced anything though). I just didn't feel like it was for me. One day, he took me out with him to see him do a procedure. I'd no clue what was going on (I was like 15 at the time), but I remember seeing him walk into the cath lab like an absolute boss, get all scrubbed up, and proceed to effortlessly insert the catheter into the pt's groin and masterfully thread it up to the coronaries.
On the other side of the lab, I saw the computer screen light up, with contrast filling the coronaries and the heart itself. It literally left me awestruck. That grainy video of the heart bobbing up and down was the single most f**king coolest and fascinating thing I'd ever seen in my short life. He then proceeded to put the stent in, and that was it. All done in 30 minutes. The fact that one could put a wire into another human being and "fix" their heart (and pain) just like that, was absolutely astounding to me. That moment is when I decided that I should atleast give medicine a chance.
So that's how I decided to go to medical school after undergrad. Throughout school I knew I wanted to do "medicine," but I wasn't sure which field exactly. To be honest, there were times during undergrad (and med school) I felt absolutely helpless and drained for various reasons, and reconsidered my choice of career (any premeds/meds reading this: It is NORMAL to sometimes feel unsure about your decision). But I grew a pair and continued on.
I developed an interest in internal medicine during our school's pathophysiology course in M2 (especially the cardiovascular module). It just made so much sense to me (and was pretty logical too), and I actually enjoyed studying for both the Step 1 and my course exams. So I went into M3 almost 50% decided I wanted IM, while keeping an open mind for other specialities too. I did FM, Psych, Peds and Ob/Gyn before my IM rotation. While they were all fine and dandy and I learnt a lot, I never really felt "at home" in any of these rotations. I was always looking for ways to get out of the hospital (after doing my duties, obvs) and go home to study for the shelf.
But my IM rotation was fantastic. Sure, the hours were ugly, but man it was amazing! For the first month I rounded with this badass legend of an attending who knew pretty much all of medicine. Our rounds were 8a-2p or 3pm mostly. Loooong, but absolutely PACKED with teaching (especially the physical exam) and pimping. I'd barely have 15 mintues to grab a quick lunch before heading off to lecture, and I'd often come back after lecture to check up on my pts or to read about them. IM was the first time I truly felt "at home." I would arrive at the hospital at 5:30am, and before I knew it was already 3pm. The hours didn't matter at all. I loved talking to my patients, and learning more about them. I liked to think I was their friend. I would routinely stay later to read up and go home just to eat and sleep.
What draws me to IM?
1)The doctor-patient relationship in IM is a major draw for me. I want to have meaningful and long term longitudinal relationships with my patients.
I once took care of this older woman with DM, HTN, CHF, AKI and tons of comorbs for 3 weeks. She was almost always delirious so she couldn't talk much, plus I didn't speak her language very well. I saw her multiple times a day every day, trying to talk to her and doing whatever I could to make her feel comfortable, and advocating for her during rounds. Even as an M3, I was essentially an intern when it came to managing her (encouraged and supervised by the rest of my team). I became her and her family's primary point of contact. I gladly endured several episodes of being shouted at when her family was frustrated at having to deal with a medical student instead of having 24/7 access to an attending. When my rotation with the team ended, her daughters were very grateful and basically insisted I stay on. I find this kind of work extremely rewarding and fulfilling.
2) I love the logical, detective work it takes to come to a diagnosis in IM, and find the breadth and depth of IM to be staggering.
IM docs have to know a **** ton of stuff, despite having specialities to consult. The immense depth and breadth of knowledge and topics in IM was also a big draw for me, and I didn't personally feel that way in my other rotations. There's always so much more to learn! I found it intriguing and challenging to learn how to use all the available data (Hx, phys exam, labs/imaging and what to order next, etc) to figuring out what a patient has and how to manage her best.
Edit: I'm probably headed into cardiology after IM, but I feel I'll enjoy IM just as much for the above mentioned reasons.
So there you have it. Sorry for the long post.
Now I just hope I don't become jaded after 3 years of residency due to all the red tape and other BS.