U is for Unique because uniform is boring.
Unique is to avoid falling into the stale routine of daily life. The world expects certain things of us from the time we are born. These are often related to the station that we are born into in this life.
It is not something that everyone can wrap their head around, so they create their own version of themselves. They refuse to give into what the world expects whether it is by wearing something outrageous or living a lifestyle that the world disapproves of.
Why is being unique important to you? What do you do to make yourself unique?