I reckon Being Human will take every expectation you have and twist it on its head by the end of the series, including most of the ones you mention.

But then I found ep 4 one of the most brilliant and compassionate considerations of paedophilia I have ever seen, and you just found it blarg, so we may be coming at it from different angles.

Can't really say any more without spoiling you and I don't know your attitude to spoilers.