I have definitely changed a lot through med school, not necessarily worse or better, just different (i'd say leaning towards better). I've noticed myself becoming more perfectionistic (thought far far away from perfect) and sometimes a bit OCD about certain details, while more impatient with irrelevant things (or just better at judging what's important and what's not). I'm better at recognizing when my time is being wasted, and am a lot more impatient with that than i used to be (which is def a good thing).
I feel pretty similarly. Out of curiosity, anyone find themselves feeling more/less compassionate with patients in general? I know I have become more cynical throughout med school and now in residency, and I am still about as mildly compassionate as I was when I started. What stands out in my head is when I was interviewing for med school and everywhere I went the programs would stress that they wanted very compassionate people in addition to being solid academically. I used to think that compassion took a back seat to academic ability, but I wonder with all this talk about declining salaries, stress up the ying-yang, noncompliant patients, etc, whether compassion should be higher up on the list. I figure that those who feel compelled to take care of people regardless of how much they "deserve" it are probably much happier with their work independent of the hassles.