Also, from a technical point of view, as you're standing in front of a microphone all day, it's quite a good idea that I should play a laid back sort of character because if he was too frenetic, I'd be exhausted by lunch!
Eight o'clock is hard no matter what network you're on because people have to make a decision to sit down and start watching TV. Every other time slot is a time slot that happens after someone's watching something else.

