There are two really lovely Korean films about childhood separation and attachment, both made by women: So Yong Kim's "Treeless Mountain" and Lee Jeong-Hyang's "The Way Home". I saw the latter on SABC a couple of week's ago. These make quite good alternatives to the famous Robertson documentaries which were made at the Tavistock Institute and were quite expensive to acquire when I last tried about 10 years ago. "The Way Home" also tackles how shocking the differences between urban and rural life could be for a child, spoilt by the consumerism of the city. A film that manages to eschew the usual good/bad polarities in its main protagonist and at the same time gives a sobering picture of the plight of illegal immigrants in France is "Welcome" by Philippe Lioret.
Finally, a really fascinating documentary made by Chris Rock called "Good Hair" about the billion dollar hair industry servicing Afro-Americans in the USA.