I am guilty of coordinating but we don't do character clothing.
I will coordinate the color of our clothing to go with the coloring of the parks or which areas we might visit that day. We don't all wear the same thing but the color schematic matches.
ie. Animal Kingdom...reds, yellow, oranges, browns and certain shades of green.
Hollywood studios...reds/blues/whites/black
I won't bore you with the rest, you probably get the idea.
I do this for a couple of reasons..
#1 It drives me nuts when I look at a picture and the clothing all clashes.
#2 I either scrapbook with paper or do digital books. I want it to look nice.
I do this regardless of whether we go to Disney or if we go to a museum, game, performance. It takes me no extra time to coordinate, pack in order, etc..
My boys pick out for the most part their own clothing, I just pull the outfits that work best for each park day.