I've never had to wear a uniform... Probably because every school that I have ever attended had less than 450 students attending...
But in middle school, we had a dress code where no one could wear hooded, zipper up jackets... It got quite cold in the winter... D:
I've always wanted a uniform, because I don't have the best clothes so every day it's a struggle to find something decent to wear... Erm... Yeah... I only have about ten shirts good for school so last year and all throughout middle school, I was picked on because of my clothing.
I feel that uniforms would be better because then no one would have to get bullied just because of what they are wearing. ... That and you wouldn't have to worry about what you're going to wear to school! :P
... But yeah... I think that our schools don't have uniforms because our student body is so small! XD This year at my new school, we have no 12th graders, 13 11th graders, 30 10th graders, and like... 40 9th graders... :D Very small school.