Out of the six or seven Hitchcock films I've seen so far, my favourite is still North By Northwest.
My least favourite is the one I watched last night - The Wrong Man. Hitchcock addresses the audience at the start of the film, telling us its a true story. Maybe that's why it was so boring and predictable.
However I think I once caught a few minutes of The Birds a long time ago. I remember thinking it was reeeeeeeeeeeally poor. I don't know what I'd think of it now, but is it as crap as everyone says it is?