I was an incorrigible know-it-all, a quality which manifests as bratty in kids. I suppose the only thing that's changed is that I know more, now. This characteristic stops being "incorrigible" and starts being an asset once you hit a certain age.
I didn't really have passions, just flights of fancy. Some people went to school to get an education; I went because my mom dropped me off there every day and because it was no real trouble. Made friends with people who were funny or smart, but mostly just sat back and watched.