I'd like to say I finished watching Witch Hunter Robin in the space of 3 days because it was so damn interesting that it glued me to the screen, but the truth of the matter is, I caught a cold and spend most of the last 3 days in bed with a fever and nothing better to do (not that I usually have a world of better things to do). Still, there's no denying that this show is made of awesome and I can't help but wonder why it isn't more popular. Perhaps it has something to do with the slow pace in the first half of the show, or the absence of shipper fodder, or the blatant lack of fanservice, especially for a Sunrise production.
The series kicks off with the introduction of a ragtag group of (le shock!) witch hunters working for an international secret agency responsible for the control and concealment of the witch population. A new hunter, Robin, is relocated from Italy and partnered with the resident stoic hardass Amon, much to his dismay, both because of her young age, and the fact that she's, in essence, a which - something he has issues with via Tragic Past and an Oedipus complex. Now, right off the bat, the show's opening strongly suggests that Robin has something of an unhealthy obsession with Amon, and I was wary at first that her character would mostly come down to that single overdone-to-death trait, but, fortunately, Robin quickly turns out to be an awesome and strong lead in her own quiet way, to the point that she actually makes Amon look like quite a sissy in comparison. The rest of the hunters mostly come across as relatively interesting people, as well, even if some of them did deserve more character development that they got. A computer hacker who one day hacked himself into virtual imprisonment at STN-J's headquarters, an adorably cheeky girl who turns out to be a lot more formidable than her casual attitude would have you believe, a grumpy boss with a heart of gold and... some other people who weren't quite as memorable. But the supporting cast is where the show really shines, especially with the ambiguously camp bar owner Harry and the fuck-awesome lawyer Nagira, who are probably the best things that ever came out of this show. Adversaries vary from just-your-run-of-the-mill nutjobs to misguided people with genuinely good intentions, with the show's Big Bad being a rather fine example of something in-between.
I've mentioned that WHR doesn't have much by way of obvious romantic pairings, but somehow, it still manages to be incredibly romantic in a very subtle, unusual way. The friendship and trust that develops between Robin and Amon during the course of the story is reminiscent of Nikita and Michael (if you disregard the large amounts fail that otherwise consumed La Femme Nikita) or Mulder and Scully (before Chris Carter went nuts and turned the X-Files into a Latin-American soap opera). Come to think of it, Witch Hunter Robin can be compared to American shows like the X-Files in more than one way, and a lot more than it can be compared to the usual anime cliches. At least those that I'm aware of.
The grim art style fits the atmosphere of the show rather nicely, though I must admit something about the character designs seemed rather strange to me at first. Still, there's no arguing with the fluid and natural movements; the animation is consistently good, but I guess that's only to be expected from a 26 episode show. The soundtrack, on the other hand, is nothing short of brilliant and the opening theme has quickly shot up to my anime top 10.
Another positive point worth mentioning is that the English dub is pretty much equally enjoyable as the original audio, and this is not something I often say. Then again, how can anything that has Orengi-kun's VA in it be bad? :V Funny thing, one of the characters shares both a seiyuu and a VA with Lelouch.
All in all, I'd give Witch Hunter Robin an 8/10 on my personal scale. Granted, it's not revolutionary or anything, but then again, I tend to enjoy un-revolutionary things with plain old interesting stories more often than I enjoy stuff that sets up landmarks.