That's the essence of our disagreement. I don't think it's accurate to think of "his" characters at all. He did not write the vast majority of his scripts, and I haven't seen evidence that he cared about character development much. Rather than "his characters", I think it's much more accurate to think of "his scenes". He seemed much more interested - not only in those clips - to discuss how to construct a scene, rather than how to develop a character. Of course, his films are "concrete" in terms of plot rather than "vague" or "abstract" like Fellini's or, say, Godard's, but I think it's just wrong to attribute to Hitchcock's type traits observed in the characters of his movies.