I think that people buy expensive clothes because they want to be fashionable and unique. But sometimes even cheap clothes can make you look better. As for me, I prefer comfortable clothes. For example - T-shirts, jeans, boots and etc. My friends prefer this style of clothes too. By the way, I am not sure that we need school uniform. Everyone wants to look special, and we can't wear clothes which is comfortable and unique if we have to wear school uniform.