One thing I want to add to the conversation on "strong" female characters is that just because a woman comes across as strong, independent, or otherwise not stereotypically feminine doesn't guarantee they represent feminist ideals. If anything, some of the most viciously misogynistic, anti-feminist people I have met were women who distanced themselves from the perceived female norm and identified more with the male half of the species. Being a so-called tomboy doesn't necessarily mean you recognize that women are people too.
Don't get me wrong, I'm all for action heroines, but giving one chick a sword doesn't mean you can't subscribe to sexist thinking.
That is actually an excellent point with the Anita Blake character. She several times has other female characters try to get her to sympathize with them from some sort of "sisterhood" perspective, but Anita just doesn't get it. She sees herself as having to keep up with male cops in a hyper-testosterone environment, and pushes hard to be "one of the guys." She doesn't have close relationships with other female characters - thus, a downside to the transgression I earlier mentioned about how exhibiting aggressive "male" characteristics separates women from their traditional roll as "doormat." In this case, Anita become socially separated from women entirely by her aggressive nature and dangerous occupation - eventually, as the series rolls along, she is almost entirely surrounded by male friends and co-workers, and those few women in her life are like her, or married to men like her.