Angie, I saw your response to my comment on the more "conservative" (my word) feel to the twinset concept, and I do appreciate and understand it. I don't necessarily equate "conservative" and "boring" either.
It's true of art and design, and it's true of creating an outfit: Sometimes the most "simple" things are the hardest to achieve beautifully and successfully. I think there's a fine line between a simple look done well and a simple look looking... well, simple. Contrasts in texture and quality of fabric and workmanship go a long way to making the simple look elegant rather than thoughtless. I think there's a risk in the twinset of looking like one just picked up the cardigan and the shirt together in the store because they were shown together on the mannequin -- the interior design equivalent would be buying an entire living room set exactly as its shown in the store showroom.
I think the looks you posted in the forum post on twinsets were lovely, but I'm not excited by them. I'm going to take another look when I have a moment and try to figure out why. I do know that even the word "twinset" evokes a not-entirely-positive reaction from me. It makes me think of conservative, preppy looks, which I don't connect with very well, so I know I have a bias from the word go!
This is all coming from the girl who's wearing moto boots, a black leather jacket, and a Desigual skirt today, so consider the source.