Nashville is the usual USTV drama, but it's also got a subversive streak in that, while almost all USTV dramas are about the wealthy, affluent or middle classes and the dramas specific to their income bracket, Nashville is quite clearly a show about white trash, but unlike shows like Revenge or Ray Donovan with equally ludicrous storylines in affluent white American surroundings, it's not actively unpleasant to watch.
