I'm happy with a uniform. I went to a girls school with a strict uniform policy and it was hard enough to work out how to do my hair in the morning, I'm so glad I didn't have to choose my clothes too!
My ds is at a Kinder attached to a school and he can wear the school's jumper if he wants and most kids have 1 of them, but don't necessarily wear it every day. He needed one for the school photo last year (mid-year) and that's when I bought it for him and he was thrilled and said 'Oh, great, now I'll look like everyone else!'. I had no idea he even noticed (he was 4 years old). This year is his 2nd year of Kinder and I've adopted a uniform for him of plain tops & pants & the school jumper. I've found it SO much easier. He has his kinder clothes separate in his drawers and I need so many less clothes overall and I don't have to worry if dh chooses his clothes that he'll go to Kinder in the most expensive clothes in his drawer!