He's just a victim of over-exposure. A safe yet reasonably witty/intelligent choice for any application, though it has seen him stretch himself for anything that's required a bit of use of his wit. I have vague memories of a Sports Personality thing that had me blushing for him, though rather have him than ant/dec/kaye/willoughby/bbc-radio-style-presenters.
I think he'll always be up in my estimations as I heard him re-tell some anecdote from way back when he was in Hollyoaks (pre G&S), and he refused to film a scene where him, the young fatty, had a picture of baked beans in his bedroom, and made the producers take it down as he didn;t want fat people stereotyped as being solely interested in food...anwyay he made it sound a touch more grandose than I do, but anyway...
That awful thing he did with The Other One From G&S was painful and made you feel like shouting DID YOU LEARN NOTHING FROM THE MITCHELL AND WEBB LOOK?? at the screen though I can't hold it against him.
I still think there's a lot worse in the industry to do the function he gets hired to do.