I said a few things about my motivations for practicing medicine and indicated how medicine would fulfill my desires as far as intellectual stimulation, doing meaningful work, etc. are concerned. I then talked pretty generally about how I imagined my practice--group, specializing, etc. I was pretty vague and didn't specify one certain specialty because (1)there's no guarantee I'll match, or even get into med school at all (2)my interests may change after rotations, so it's probably naive to say that you already know what you want to do and (3)my advisor told me not to seem set on a particular specialty because in his estimation, it reflects poorly on your open-mindedness or something. I didn't take this essay very seriously. In hindsight, I probably should have gone into more depth about my life and practice. Oh, well. I finished by quoting Yogi Berra, so how bad can it be, right? 🙂