To what degree are we perhaps idealizing (or romanticizing) these decades? In other words, those decades look cool when we consider the impressions of them left by novels, television, film, radio, and merchandise, but do these things leave out so much that we don't really get to form a very well-rounded picture of what life was like then? It's hard to get a real sense of a decade when one can only look back at it through a modern lens, without the direct experience of having lived it. Social and civil rights issues aside, I'm not sure yours is a very simple question to answer. Just something to think about. Personally, I'd prefer the 30's as well.