I never got around to watching the pilot but now the series is on at a time where the choice is this or what is the latest series of Supernatural so for now, Being Human is going to win out. Not having seen the pilot I have no frame of reference which I can see being a good thing and bad - bad because it would be a pain to hear the treatment had more promise, the earlier actors playing Mitchell & Annie were better etc etc but OTOH I won't have to mourn the loss.
Overall I think it shows promise. As a comedy drama, I think the drama works more effectively than the comedy which struck me as rather forced and awkward. It felt as if the they were scared about it all being grim and were putting jokes in when the tone really didn't call for it or really need it. I am optimistic that things might improve when the show relaxes and finds its true voice a bit. As to the characters, I rather liked then all - I am least impressed with Mitchell just because I'm frightened the show won't quite be able to avoid giving a sort of Angel Mark II. I have the horrible feeling his arc is going to feel overly familiar but on a BBC budget. Staying positive, the notion of the Vampires infiltrating the Police like a sort of Undead branch of the Masons worked very effectively in the sheer matter of fact quality of its handling.  Also because of the urban myth (??) that the UK Police is controlled by the Masons anyway and presumably they are used to being infiltrated by vaguely occult forces. I hope we see more of Vampire Policeman. Also, Mitchell looks a bit like a young Jeremy Northam so much as I might roll my eyes at Mr wounded-but-still-so cool, I can't deny the hotness.
I liked George, mostly for the skill of the actor. As proof of his presence, I immediately recognised him from his small role from the David Suchet version of Agatha Christie's  "Evil Under The Sun" from years ago. It wasn't much of a role in that either so it is evidence of real presence. I am hoping they give him a lot more to do because he has a lot of talent.
Annie's the character I like the most so far, largely because I think the young actress did a very effective job of conveying some of the complex emotions that might come to a ghost, that mixture of yearning to be a part of the world again as shown by her eagerly seeking updates of her friends and family tempered with the sinking realisation that she never directly  interact with any of them and that they'll all gradually move on. also an interesting take on agoraphobia too, with her resenting having to stay where she is but also being frightened to move on.