A comment from Jazz
Well, I've never really thought, in much detail, about what made me like learning and subsequently led me to this board, but it seems to be a combination your suggestions. My parents both went to Ohio State University. My mom is now a work-at-home pension administrator (something with retirement plans and mutual funds) and my dad is a research scientist. I've lived in five places since birth until 5th grade when we moved to my current home 7 years ago. With never living in the same place for much more than 3 years I frequently got friendships cut-off. This probably caused me to be somewhat shy and make fun for myself. My mom is always reading and my dad watches Jeopardy! almost every night. Early intellectual interest, I guess, contributed a great deal.
I always found school rather easy. I don't know how to explain it. My teachers weren't always commendable. I couldn't stand my 2nd and 4th grade teachers. Miserable despotic folk, they were. My favorite teachers were all in high school: German, Jazz Band and AP Physics. For some reason or another, these three teachers just know how to teach their classes and make it fun.
Nothing recently has contributed more to my educational interests than this board, though. This is mainly in what I read. Because of these discussions I've been reading Voltaire, I just finished the Hitchhikers Guide to the Galaxy (crazy stuff, Tsuwm) and I just started Goedel, Escher Bach. My, what you people do to me. . .