I imagine random but surprisingly shared tidbits like your favorite spongebob character being Plankton. Or remembering your most embarassing MySpace post. Or your favorite toy growing up being one of those super balls that you bounced into oblivion one day, never to be seen again (hey, it said "super" after all).
Those buzzfeed-esque tiny details you probably wouldn't think about unless prompted. But it can say a lot about you and where/how you grew up.
What kind of things should I imagine here?