A final word on taste formation and its relation with social background of individuals: Pierre Bourdieu studied extensively the way taste is shaped in a book called Distinction: A Social Critique of the Judgement of Taste. It has been quite criticised because of its deterministic approach. More on Bourdieu: http://en.wikipedia.org/wiki/Pierre_Bourdieu
For a criticism on Bourdieu's approach, Bernard Lahire confronted the arguments in Distinction in a book called La Culture des Individues. There is a short article on him in the French Wikipaedia.