Someone asked me this once. My answer, which is still the same today, is that Suchet for me is best in the shorter 1 Hour episodes of Poirot. I think Ustinov and Finney do better in the movie versions of Poirot. Most of Suchet's tv movies, at least for me, didn't turn out that great compared to Ustinov and Finney's versions.
Ustinov was the Ideal Hollywood Poirot, a Characature of the Man which is what you want for a Film but Suchet Looks like Poirot where as Ustinov Didn't so I would say it depends what you want, Do you want a Light film then Ustinov, If you want accuracy where you can see the Humour then Suchet.
Have you seen the way Ariadne is played in the Parker Pyne stories with Maurice Denham? The Actress is brilliant.
I agree Japp is excellent the only thing I can say against the way ITV has him is that I think Agatha Christie gave him a Bowler hat not a Trilby
David Suchet is my favourite Poirot, he looks just the way I imagined him from Agatha Christie's descriptions, except that she gave him green eyes. Peter Ustinov just didn't look right.
I agree with MissQuin, Countess Rossakoff was badly miscast. In the books she is described as large and flamboyant, but instead they made her small and rather characterless.
Regarding hats, Poirot wears a homburg, not a bowler. Japp's hat isn't a trilby, it's a fedora. Hastings also wears a fedora, albeit with a little more style than Japp does!
There is an actress in an Episode of Midsomer Murders withLarry Lamb, she reminds me of Diana Rigg, she might be good as C. Vera
No Delicious_Death, This woman plays a wife I think with long dark hair, she has a very harsh voice like Diana Rigg Has, It isn't an Episode I like very much so don't remember POILER ALERT I might be wrong but I think she plays a Murderess
You've got me intrigued now Tommy_A_Jones, I'm going off to watch that episode of Midsomer Murders with Larry Lamb.