Not that I think I really sound like him, but in the sense that one has a voice in the head the one I hear recently resembles Bill Nighy.

At least on his outings on radio such as A Charles Paris Mystery: Murder in the Title.

If you've not been listening to the current series, check it out at:

http://www.bbc.co.uk/programmes/b00w5fgv

and click on the iPlayer Listen Again option. Episode three tomorrow.