I got into Darker Than Black because of its creators- Tensai Okamura has made some real nice works before, notably Wolf's Rain. In that series, he also worked with Yoko Kanno, the composer of some of the best soundtracks I have heard in my life, most importantly Cowboy Bebop. However, this series isn't as good as those mentioned earlier, but it is still good.
The problem with DTB is that it starts bad. It's just confusing, we don't know what's going on and we don't know the characters, so it's hard to care about them. Not only that- what I expected that would save the series, the music (I believe that music is as fundamental as anything else) wasn't that great either. Kanno's music just didn't stand out, and even the opening and closing themes weren't hers.
However, if you have patience, there's a point where we get to know the characters. Some story arcs get really interesting and when a episode ends, you will want to see the other to know what is going to happen. And it gets fun and turns out to be a nice experience. However, I would only recommend it to anime fans- not the general public. There's still a lot more series in the same vein of DTB that are much better and you should see them before this one.
