If, like me, you've never been able to figure out the Oprah appeal, this article from Lee Siegel in The New Republic may help (and lord knows in the Age of Oprah we all need some help.)
A sample. "Think of it like this: The media is Caesar. Having mastered and then revolutionized its idiom, Oprah is Christ. Like changing water into wine, she has managed--through her elevation of hidden, obscure, or neglected experience into spectacle--to make the television set watch you." And it gets better.