Poirot’s chief personality characteristic was undoubtedly his overweening - but lovable - egotism. On rare occasions he would present an appearance of modesty, but it was patently so forced and false that it fooled no one. Some of his own evaluations from one story or another: “Hercule Poirot… is of a cleverness quite exceptional;” “impossible to deceive Hercule Poirot;” “me, I know everything.”
- Russell H. Fitzgibbon, The Agatha Christie Companion
Would Renly have made a good king had he taken the throne? He seemed more like a strutting peacock who believed that popularity and charisma gave him the right and ability to govern.