The thing I find most interesting about Supergirl, as a concept, is that she is a perfect vehicle for exploring culture clashes and immigration.

After all, Kal-El was raised on Earth, with Krypton being a distant concept. There's certainly things to explore there -like him getting "back to his roots", so to speak- but Supergirl's situation, of being old enough to remember her hyper-advanced civilisation then landing on Earth, strikes me as being one that could be fascinating to explore...

...So, does anyone have any recommendations for stories dealing with that concept? I think that the New 52 series touches on those themsmes somewhat, but is there any particular volumes that address it? Or any classic stories that do the same?