Mine has to be David Suchet because his acting is superb! Currently, I'm going through his Poirot DVDs and am blown away by the so subtle facial changes he makes which you'd never be able to see on stage. I also have his book on how he "became" Poirot which displays the attention to detail he had and how true his portrayal is. I've only got one more DVD to watch and that's the one when Poirot dies. Added to that, he is a real gentleman who is both modest and proud of what he 's done.