Nice article, Tim.
I have to admit - I'm stubborn. I probably shoot 75% of the time in full manual mode. And I spend a lot of time kicking myself in the rear that I didn't use Aperture priorty, since I'm always just a little off on the settings.
90% of my creative decisions are made by choosing Aperture setting first - whether based on selecting depth of field that I want, or judging the light and deciding I need a wider setting to allow more light. I think I'm going to make a conscious effort to shoot more often in Av mode for the next few months to see how I like the results.