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!
We have all had the experience of finding that our reactions and perhaps even our deeds have denied beliefs we thought were ours.
Whether you're a mechanic or you build houses or you work in an office, you don't have to like your boss.