That, though, is a very personal opinion in my part. When I first saw the show (season 1) over a year ago, I liked it, not that I am comfortable with the concept of sending people off to hell just because they treat you harshly. I was of the opinion that we aren't the judges of whether someone should go to Hell or not. But it was such a sad show, and me being the sucker for melodrama, you get what I mean.
The second season, Jigoku Shoujo: Futakomori is much more maturely themed, much more problematic - if that sort of stuff appeals to you because when in the first season we see teenage schoolgirls calling upon Ai Enma to send people off to hell just because of one thing or another (problems that are not that serious in nature, in my opinion) so that they would feel a lot better afterwards, in the second season that act becomes in many cases, a necessity for justice, to save others, or maybe even for the good of everyone. The Hell girl's clients are much more mature and more capable of making their own decisions by thinking carefully about it, and they've got more experience on life too.
Ai also takes a much more personal, active role, and she becomes much less of the neutral observer from her twilight home. We see more of her, Wanyudou, Ichimoku Ren and Hone Onna as well as a couple of new characters who are important to the story's climax as it unfolds. They become real people, and much less of Hell's tools in Futakomori. Add the great melodramatic music to that, and be prepared for a bitter ending (bittersweet actually) which will leave you wonder ... is justice done at last? Is there finally peace?
I like it. It shows me a lot more about this world in which I live.