Have you seen the clothing range that is sold, cannot remember the name, but it's all wrinkle resistant clothes? Some of the stuff is ok but most is a little frumpy, but I like the idea of things that you can pack and not have to iron when you reach your destination.
Second part to this topic; do you have a particular outfit that is most comfortable for you when you are flying, or do you just go with whatever you happened to have put on that day?