Self expression should not have to be used through clothing but through how you do in school. Uniforms create a unified working area. I think it's good to be able to feel professional while not getting stared at school. If you wear uniforms it's going to take less time in the morning to get ready which I can say from experience is very helpful. Coming from an academy we have to wear a tailored skirt and a white or blue polo with our school logo on it.