Last November, my bike went out from under me and my face hit the ground. It wasn't until I examined my helmet that I realized that it probably saved me a trip to the ER or worse. The thing is that I considered not wearing a helmet that day, as I often did for short, around town rides.
The problem is that I immediatly replaced it with a white Bell Ukon. (in addition to riding fixed gear, and a roadie, I'm also a commuter who likes to be "visible").
Then I got aero bars on my road bike and discovered that the visor made it hard to see forward. So I removed the visor. Now I have the dorkiest looking helment ever.