Day 23 - Most annoying character
This makes me so sad because I used to love this character and the actor is very handsome and very Irish. But they gradually made him greasy-haired and whiny and I'm still waiting to see how that serves the larger story. The best thing about Being Human (UK version!) at the outset was that it took these overdone character types and approached them from a different, often humorous angle. Eventually, though, it fell into traps/tropes it used to take such pains to avoid.
Of course, I still watch it.
(I picked a clip from the pre-deterioration era.)