I used to be quite apprehensive about this anime and did get too depressed to finish it when I got half way through. For those of you have been "turned off" by the pathetic negative hype and that there isn't (and never should there be) a 3rd season, I tell you that this anime is very much worth your time.
The creators of this story did an excellent job of character development and advanced the story past what I had thought. I will admit that there was some patch work to add this second season to what seemed like a complete first season but those quickly fade away half way through the story. And BK-201 is still total bad ass! Watch it! buy it especially for the OVAs which will fill in a few holes! This (including season 1 & the OVAs is one of my favorite animes hence forth!