“Frida” has been one of the most talked-about movies of the season (at least by artists). But when Julie Taymor was offered the film to direct, she hesitated. “I wasn’t interested, even though I’m a painter, because normally I don’t think you can figure out why a painter paints. How do you know? You can suppose many things, but often the artist comes out quite monstrous, full of angst, and you never get behind the inspiration.”