Suspicion and Vertigo are my two favorites; I can't decide which one is better. Hitchcock's use of Cary Grant was sort of like a pre-post-modern methodology and is really Grant's best role (and Joan really did deserve that Academy). At the same time what Hitchcock did with Stewart, playing him against type. As for the other films, I have so many more I need to see, especially his prewar films. My other favorites would be Rope, Psycho (duh), Rear Window, The Man Who Knew Too Much ('56), North by Northwest, To Catch a Thief, Rebecca, Jamaica Inn, Lifeboat, Notorious, The Lady Vanishes, Strangers on a Train, Dial M, Stage Fright, Spellbound, and The Birds (my least favorite but still so much fun). God I really need to rip out some Hitchcock; I really miss his shit.