Hercule Poirot sort of obsessive-compulsive" in Poirot. As mentioned in "Curtain" and "The Clocks", he is fond of classical music, particularly Mozart and Bach. In "The Mysterious Affair at Styles", Poirot operates as a fairly conventional, clue-based and logical detective; reflected in his vocabulary by two common phrases: his use of "the little grey cells" and "order and method". Hastings is irritated by the fact that Poirot sometimes conceals important details of his plans, as in "The Big Four". In this novel, Hastings is kept in the dark throughout the climax. This aspect of Poirot is less evident in the later novels,
Hercule Poirot as he had been to her: a great detective, a remarkable man, if, perhaps, just now and then, a little irritating. I think back to Poirot’s last words in the scene before he dies. That second ‘Cher ami’ was for someone other than Hastings. It was for my dear, dear friend Poirot. I was saying goodbye to him as well — and I felt it with all my heart. The writers of the "Binge!" article of "Entertainment Weekly" Issue #1343–44 (26 December 2014 – 3 January 2015) picked Suchet as "Best Poirot" in the "Hercule Poirot & Miss Marple" timeline.