Actually, I should be ashamed of myself. I've just been getting indignant on Mary Beard's behalf, for being judged by her looks (and abused for it - complete wankers!). I know Being Human isn't history, and these actors have in fact been chosen for us to leer at, but there's loads of plotting to discuss, too, and I think it;s been done very well.
Incidentally, did anyone else spot that Toby Whithouse was playing the Home Secretary (disclaimer: I only spotted it in the credits; I'm not the sort of geek who recognises TV writers, only Mark Gatiss, and that only because he's been in Sherlock, and also played Mr Snow in BH)? That must have been fun, especially committing the evil of Bringing Austerity to Our Protective Frameworks! Talk about dismantling the social safety net! 
It's interesting that Rook was proposing one of the same old solutions: install an ally, and let him get away with a certain amount (the per diems and consensual blood letting), even though that didn't work out terribly well with Mitchell (nor with Saddam Hussein and Osama bin Laden, I seem to recall), whereas the trinity bond seems to tie down the worst of vampire nature (and isn't too bad for the werewolf and ghost, either). What a shame it has to be chosen: imagine Herrick and Annie having been forced to live together! Quiiiick! Where's my door?!