Very well, where do I begin? My father was a relentlessly self-improving boulangerie owner from Belgium with low grade narcolepsy and a penchant for buggery. My mother was a fifteen year old French prostitute named Chloe with webbed feet. My father would womanize, he would drink, he would make outrageous claims like he invented the question mark. Some times he would accuse chestnuts of being lazy, the sort of general malaise that only the genius possess and the insane lament. My childhood was typical, summers in Rangoon, luge lessons. In the spring we'd make meat helmets. When I was insolent I was placed in a burlap bag and beaten with reeds, pretty standard really. At the age of 12 I received my first scribe. At the age of fourteen, a Zoroastrian named Vilma ritualistically shaved my testicles. There really is nothing like a shorn scrotum, it's breathtaking, I suggest you try it.
That's about as far as I got before they kicked me out of the interview, so I wouldn't recommend you follow my template. But seriously there are a million ways to approach a question like this and to be honest the interviews couldn't care less if you forget to mention the number of siblings you have and instead decide to say where you grew up, or if you forego mentioning all of your ECs and instead emphasize one. It's hard to mess up this question if you avoid controversial topics and things that are too personal. When I had this question I'd ramble for a bit and just follow the flow of the conversation. Inevitably something I mentioned would interest the interviewer and they'd interject (they've done this many times before 😉)