Two Ways to Create Harmony: Repetition vs. Contrast
Gingerly wading into the sea of confusion surrounding the "flowiness" of fabric, I'll start by calling out the idea, as requested by Jennifer, behind the rule of the thumb prescribed in The Triumph of Individual Style:
The principle is to create straight lines where your body is straight and curved lines where your body is curvy. (Remember this saddlebag solution? That was a medium taut fabric constructed into a curved shape. Hmmm ... like a fitted jacket or blouse with darts.)
In this, and most of the other artistic principles I have blogged, harmony is created between clothing and the body of the wearer by repetition. Using a color palette based on your own personal coloring is an obvious example.
Contrast is another way of achieving harmony, and emphasis. (Boy, do I feel the need for an art teacher about now!) In color, the example would be to use the complement of your natural color.
(No doubt Wendy is correct in suggesting that fabric choices are related to personal idiom, even as Vildy had noted that she has a "crisp personality".)
But what about Jennifer's other question: Doesn't that make you look more extreme? Which emphasizes the natural straightness or curviness of the body more, repetition or contrast?
More thoughts? If one learns best by discussing a subject, I suspect I'm going to be on this one for a while.