I thought this was interesting. It's a listing of the top 15 TV shows watched by Republicans vs. Democrats.
http://www.tvsquad.com/2010/11/10/republicans-love-modern-family-democrats-favor-dexter-new/You can take the article with a grain of salt because it's not exactly a case study. I don't know the methods by which the lists were calculated either, but I thought some of the findings were funny.
Republicans are fans of American Idol, while Democrats prefer to watch Khloe and Kourtney sluttin' it up in Miami.