I always meant to actually finish Witch Hunter Robin but I never got around to it. I accidentally fell off while it was still airing. I remember liking what I saw, but that the overall pacing of its mysteries didn't quite jive with attention span at the time.

I'm looking forward to reading your thoughts of Descendants of Darkness! Always been fond of that one (though the manga is definitely better than the anime, as is often the case with these things XD)