In a sense he's got where he is through luck rather than talent, because he came to our attention as a would-be singer and he really wasn't a good singer.
But it was immediately apparent that he was likeable and witty, and that's enabled him to carve out a career as a presenter. He's never going to present Newsnight or Antiques Roadshow, but fair play to him, in the context of the lightweight popular programmes he does, he's very good at his job.