Swades
I've had the chance to watch Swades at the home cinema of a friend. Swades is a quite impressive film, and definitely [for me] one of the best recent Bollywood films.
I think the most interesting aspect is the way how they display the transformation process of an initially extremely alienated NRI (officially "Non Resident Indian", in the movie jokingly referred-to as "Non Returning Indian") back ti a "true Indian".