Here was my auto intro, think of it what you will:
" I have a theory that if you give a girl a boy's name, you're just asking for trouble. My grade-school friend, Alex, once painted black spots on her poodle, because she wanted a Dalmatian. Kris, my bus-buddy, once attacked her mom's pool party with tampon "grenades". Me, I used to ferret out all of my dad's cigarettes, and hide them in the garbage disposal. You can't really blame my parents though since they weren't the ones who named me Sam. They let the Powandas, the couple who helped my dad immigrate to America, choose my English name. Since they had a Sam in every generation but mine, they bequeathed the title to me, and perhaps doomed my parents to a decade or so of tomboy shenanigans."
Being a tomboy did a lot to the early development of my social interactions and my views on the world, lol. And I thought it'd be a fun opening. I feel obliged to make my autobiography at least somewhat entertaining since if I were an admissions reader, I'd just pass out after reading 10 autobiographies that were all dry, serious, and emotionally/intellectually heavy. But that's just my approach. Good luck!
And no worries, the auto did have points that showed my values and motivations towards medicine...etc 🙂 It wasn't all fluff.