Didn't even have it on my radar when I started med school. Had psych clerkship near the end of MS3 year. Wasn't thrilled about any of my rotations beforehand. On psych, I just felt good, and I realized it was because I was waking up at 7-8am instead of 5-6am, 'rounding' in a relaxed fashion, and most of the work (inpatient) being done by noon or 1 at the latest. Realizing you could make good money working ~30 hours a week, and a lot of that "work" is just being in the office, actually "working" like 5-10 hours but being free in the remaining hours to do what you want. I realized that was what I enjoyed most about jobs I had pre-medschool - basically, just tell me what needs to be done and then let me do it how I want, and just leave me alone beyond that.
I DIDN'T CHOOSE PSYCH, PSYCH CHOSE ME