If anyone's interested in an anime with great character development and a deep plot I highly recommend Twin Spica. It might be a bit slow developming for some, and is not action-packed, but the story line is excellent. I'm not very good at writing reviews, so feel free to check out the link so that you can get a better idea as to what the anime is about.
Twin Spica reviews
Twin Spica is only 20 episodes, and they are available at animesuki.com. I've watched the series three times, and each time is just as good as the last.