Sharp, dark series but becomes very tired and empty at some point after the second season, with only shock tactics and poorly set up surprise twists to rely on; I can't remember exactly when--read the reviews. Not optimistic about the fall 2010 reboot after seeing the preview.
Uneven series. Has its moments but has really lost its luster by the end, falling into the typical trap of big out-of-nowhere reversals and twists that cease to have any impact and cheapen everything that went before.
Series that's good in bursts, but there's a lot of characters and its convoluted and hard to follow, so it loses some of the punch it otherwise might've had. Apparently they condensed the series into a trio of movies in an attempt to do that.
This list is for the movies, TV, and anime I recommend that have females fighting (not exclusively females fighting each other) as a central theme. I'm including series with fights using magical or psychic powers but will try to note the ones that are exclusively that. There's a fairly wide range (except for extreme horror/gore like Elfen Lied, The Machine Girl, etc., which I avoid).
Most of my favorites are subtitled Asian movies and anime. With each, rather than put "I prefer turning on the subtitles over the dub," I'll just put it once here because I haven't found any exceptions yet. Most, if I had to listen to the dub, I wouldn't care to watch the movie/series at all, and I often don't even bother checking the dub.