I don't have a uniform, and I don't want one. I like variety, and I like options. When packing for something, I always pack more than I need. Not because of a fear of ruining something, or something getting soaked or splashed with mud or whatever else, but because I like to decide the day of something. If I'm wearing a suit for some event, I bring the one suit I'll need, but I'll bring two shirts and three ties. What Prince William did on his recent US swing, wearing one suit with identical shirts and what, two ties? for weeks on end would simply drive me mad. If a trip is over 3 or 4 days long, I can't even limit myself to one color scheme (I try to go with earthtones and blues or black and grays to only pack one color of shoes).
Uniforms are fine if you don't want to think about what to wear. You pick something out, buy duplicates, and never think of it again. But if you're on a message board where style is discussed and think of dressing well as an art, I simply cannot grasp how you could ever find a uniform interesting.
This is not to say that what I wear isn't coherent. It is- it all adheres to my tastes, which definitely trend in certain ways. But I could never be happy wearing the same clothes day in and day out.