I ended up liking Renge a bit too. True, she was somewhat useless after episode 34 but I think she was the only one of Zect people who never turned against Tendou/Kabuto again after that point.
As for Tendou, I have always loved his character. (Maybe I'm biased because I really like Hiro Mizushima.) Just a little random wondering, if someone else played Tendou, would he have as good a chemistry with Yuuki Sato (Kagami) as Mizushima did? (Hey, maybe you don't think they had any chemistry, let alone a good one, but each to his/her own.)
I would rather have someone else portray Daisuke/Drake too, but I think Toei made a gamble to lure in Kazuki Kato fans from the Prince of Tennis musicals. And it seemed to work. His frequent absences from the show didn't bother me as much as I found Kato to be somewhat stiff in his role. Especially when compared to Airu Kanzaki (Gon)'s excellent performance.
I also found Tsurugi to be the most developed character. He had so many wide ranges for his actions/emotions. From being somewhat of an ass in the beginning, to being a bright eye innocent, to being friend with Kagami, to being really cool and protective of Misaki, and to being the totally final badass worm. Would love to see Yusuke Yamamoto in other stuff. Period.
Yaguruma was perfectly casted. In real life, it seems almost everyone in the Kabuto cast thinks of his actor as an older brother.
Kageyama. Now that one is a little tough. He did a lot of backstabbings, underhanded, creepy stuff, but I had no reaction to his character whatsoever. I didn't hate him. I didn't like him. He was... just there, to kiss up to whomever. I do like his actor as Ren in Ultraman Nexus though.
Riku. Now that is the way an ultimate villian (or a pretended one, as it turned out) should be portrayed. Except for the last few episodes, I really love his character. He was so totally cool and in control. You never know what crazy thing he might do next. (He was sort of similar to Tendou, less the arrogance.)
Kagami. I don't think his character really grew up that much over the course of the series. On the bright side, for the most part I found his character's reactions to be consistant with who he was (naive, trusting, eager to please, etc.)
Mishima & Negishi. Tell me again what they were doing in this show.
Seriously, I found them to serve no purpose whatsoever. I did peg Mishima as a bad guy since day one (they weren't even subtle about this). Same with Negishi. And I found Negishi's sort of lecture to humanity to be damn condescending. Let humans sort out their own problems, worm invader!
Dark Kabuto. Poor, experimented upon kid. He was fated to die, of course, but there must be a better way for him to go out than the one on the show.
Overall, it had been a fun ride. The show had its ups and downs but for the most part I was satisfied with what I'd seen. I would give it 7 out of 10.
@ Morose Angel, I must say I really love your new avatar and sig. I never did like Kusaka (his actor is a very different story though), but just seeing these pics I might be inclined to watch Faiz again.