Kakuzu is a total baws and a very underrated member of the akatsuki, ranking just below Pain and Itachi in my book. He's also one of the very few ninjas who seems like a very good matchup for Itachi. I think the only reason he isn't more hyped is his limited role in the series and the fact he isn't emo. He's like kakashi in the aspect that he's just too ridiculously diverse, and dang good at pretty much all of his tricks.