I started out lower middle-class, but I was raised with an upper-class level of education and sensiblility. My father's a Lutheran pastor, but an ex-hippie, liberal-intellectual descended from poor German immigrant roots. Since his parent's generation though, his family have been well-educated and upwardly-mobile (his mother is now married to a retired Oxford philosophy professor, she herself is a writer). My mother is of Appalacian descent (hillbilly). Her father started out dirt-poor, living in the mountains of Kentucky, became a bluegrass musician, and ended up well-off in his later years raising a family in a small country town. In contrast to the standard Kentucky tradition of being plain-spoken and humble, my mom, like my dad, got her Masters degree, and comes across as well-educated and upper-class, without a trace of an accent. She's now a librarian. Currently they live in Slovakia where my dad teaches religious history and my mom's helping re-organize Bratislava's main library.
My parents were usually relatively poor until later on as I was growing up, but mostly due to having to balance their education and vocations. As a pastor in training, my father's job required us to move constantly; I've lived in "good" and "bad" neighborhoods, in Germany, Minnesota, Oklahoma, Ohio, a farm in Nebraska (next to a small country church), and California, so I feel pretty rootless (the only connection in all of this was that my dad usually preached for German immigrant congregations, so there was sort of a Deutsche undertone growing up).
Despite sometimes living in lower middle-class areas, my parents hung out in intellectual circles, and I had the typical left-y, hippie-parent upbringing; public radio, liberal politics, lots of travelling and nature hikes, 60s music, folk, and bluegrass (my parents both have perfect pitch, which I inherited, my mom plays autoharp and has won awards at autoharp conventions and folk festivals LOL). I myself went to public schools, sometimes in middle-class areas, sometimes lower middle-class... in which case I sometimes got shit for coming across as educated (especially in California), so I struggle with the ambivalence of both admiring the working class and somewhat resenting them for their aversion to education. I was an art major in college, but dropped out due to drug problems, as well as for the realization that most art careers are in advertising, which I really want nothing to do with. I'm currently going back, probably to be a teacher, while producing, playing in bands, and working on the side. Kind of a starving artist I guess (well, fiscally lower middle-class for now), but definitely without a working-class mentality.
Unless you're particularly rich or poor in America though, class seems a bit more vague out here...