My favourite is Dial M For Murder, even if I know that there are some Hitchcock's films that are objectively better. (However, they are no more than three or four). Objectively, I think that the best is Vertigo.
Vertigo, Rear Window, Notorious, North by Northwest, Psycho, Strangers on a Train, The Birds and Frenzy remain my top Hitch movies.
Some days, North by Northwest; some days, Strangers on a Train; some days, The 39 Steps; some days, Suspicion; some days, Psycho.
I think it’s easier to say what my least favorite is (Topaz). I realize that there could be worse films in his early repertoire that are more or less lost/forgotten, but as far as his later post WWII films go, Topaz is just bad and overlong. Torn Curtain and Marnie are close. But to try to answer the question: Rear Window maybe?
The Trouble With Harry. A masterpiece of understated black comedy with luscious cinematography and beautiful autumn scenery.
I like all the usual suspects when it comes to Hitchcock movies but I never did cotton to 'Vertigo'. Anyway...my favourite of his and one of my favourite movies is 'Lifeboat ' .
It’s a fun film particularly the way Hitch opens up the film with the reach to the audience. I saw a 3D revival in the 80’s in theaters. A startling moment that felt organic AND broke the 4th wall in a way.
Rear Window, Vertigo, To Catch a Theif, Birds, Psycho, North by Northwest, Rope, Dial M for Murder, SpellBound
Soft spot for Rope, it being the first AH film I saw. And that one cut to Jimmy Stewart when he realizes what's been happening..... My favourite, though, must be Rear Window. A perfect movie. The moment when Thorwald sees Lisa signalling to Jeff that she's got the ring and Thorwald looks right at Jeff, right at the camera, and right at us is one of cinemas greatest moments for me. Spine tingling.
Rear Window is my favorite, but Vertigo, The Birds, Marnie, and Dial M for Murder are all marvelous and films I really enjoy. Just slightly below all of them I like The Man Who Knew Too Much.
My instinct is Rear Window but I don't think I've repeat viewed enough Hitchcock films to really know for sure.