Did it originally cuz I wanted to: (not really inspirations, but just reasons why, ranked by importance)
1) apply science knowledge/understanding
2) help people
3) be the expert/leader
4) opportunity for lifelong learning
5) have a calling, greater than just a job
6) parents instilled in me that they expected me to make a difference in what I do in life (not "we just want you to be happy"), which leads to happiness
Now, as med school is coming to an end, it's more:
1) be the expert
2) help people
3a) make and/or apply the next scientific discoveries to push my field of interest forward
3b) stable career/income to get a nice home for my growing family
4) pay off loans
5) don't let down those ppl relying on me/who've supporting me
6) being a physician is now part of my "identity"/ego? It is who I am to everyone I know and to myself
Notice that income/stability comes AFTER 200k loans have been taken out and my youthful ignorance of needing money has worn off...but still only the 4th most important at this point, and not a consideration before applying to med school.
To piss off stuck up high school/college classmates who couldn't.
^ I could never do this, cuz all my high school/college friends are also med students or residents/investment bankers/MIT graduate-types/actuaries/lawyers/successful small business owners/Oxford postdocs, etc