What I can't stand are the d-bags who take themselves sooooo seriously, to the point that they feel the need to boast about themselves in front of their colleagues. If you're pretty much at the same level of training as I am, I'm not going to be impressed. Save it for your mom.
For instance, I was talking to a classmate earlier this year (we were both on surgical sub-Is at the same time) who was trying to convince me that he was carrying his team's entire service. And that, when he took call, he was carrying three entire services. Certainly, sub-Is can be valuable (writing the morning notes, helping out on the floor/ICU, following up on consults/labs/imaging, etc.), and there were definitely times where I was called to do a lot of extra work (our team was horribly understaffed to begin with, given our patient volume, and then we lost an R3 a third of the way into the month), but I would never claim to carry an entire service. Besides, that's not what you're there for as a student - you're there to learn, not to be the scutmonkey. Yet some students feel the need to embellish upon their actual role, despite the fact that others know that it's BS - maybe it's a defense mechanism. idk.
When people start bragging about themselves or overestimating their importance, I get a very visceral gut reaction. Unfortunately there's a lot of people in medical school and in the medical field who lack humility. Case in point - I was talking to a PGY-2 in radiology tonight who had had prior training as a physical therapist. He started telling me how he chose radiology instead of PM&R because he already knew everything a PM&R doc knows, and it would be too much like his prior practice - despite the fact that he never really practiced after PT school aside from a 1-year residency. Then he went on to brag about how patients "come in to [his] office with chronic back pain, and then leave pain-free." I was a bit fed up with his blowhardedness at that point that I told him if that was true, he should give up radiology and just open a practice outside of the ED. Then maybe he'd magically cure all those chronic back pain patients who come in all the time, and no doubt make a fortune.
Why does medical school seem to attract people who lack a basic sense of humility?