Have finally picked up some of my pull: Buffy, Angel, Spike, SPN, Batgirl (woot!) and uh... . something else that I can't remember. (I think I left three at the store for next time.)
I've only read the Buffy and here is my theory about the art: when he was working on Fray - he was working with characters that we hadn't seen before. Perhaps he works better that way than with trying to make portraits. I enjoy story and agree that none of the characters are very identifiable except in context. This makes it particulary difficult to figure out who all the brunettes are - but really we should recognize Willow by more than red hair and ditto for Buffy. (I mean, Kennedy could have been Faith.)