I saw Million Dollar Baby tonight, and it was so good. I was expecting it to be great even though I hadn't heard that much about it, and it was. Here is what Leonard Maltin says:

...if all you know is that it deals with an aging trainer who takes on a young female boxer, that’s perfect. The film turns out to be much more than that, a story that unfolds in layers, revealing itself even as it doles out scraps of information about its characters. The end result is a deceptively straightforward story that has real impact, and resonance.