What exactly was precious about Precious?

I watched Precious the movie last night. I found it visually stunning, but am still deciding how I feel about the actual movie. The acting was flawless, even shockingly enough, Mariah. However the story was so disturbing that I would hate to say that I loved or even liked the movie. I would be hardpressed to want to ever watch it again. I can see where some people might find it inspirational. I just found it uncomfortable. Like an enema.

Oh and Lenny Kravitz is damned hot.