I also worry about whether I like a given cut because of liking the actress or the hair color instead. Hmm. And there's the whole very-round-face-with-a-squarish-jaw thing. Seriously, my mom does look like Jessica Fletcher as well as wears the haircut. Have you seen the few pics of whats-her-face (Oh, Angela Lansbery, that's it) with long hair when she was young? That jaw with big cheeks looks odd with a lot of cuts.
Anyway, more pondering. Something to do to while away the New Year's Eve!
PS my sis in law rejects the short cuts as I have too much curl, and thinks the Jessica Alba bob might not work, as my hair is so thick, but that it is closest to workable.