Black Female Representation

What I've noticed in female centered film is that there isn't really a happy medium for black female characters. They are usually depicted as very weak or too masculine. Now I'm not saying that is for every film, but it does occur a lot. In regards to progressive female films, the female always needs to overcome her troubles, which generally involve a black man. For example, in Monster's Ball, Halle Berry's character is alone, left to deal with her troubles with the help of a black man. There are a lot more movies with white women who are depicted as stronger beings, capable of overcoming their obstacles, with or without a man.