Yeah I used to race road bikes and have ridden almost my whole life as primary transportation... Messenger bags do not work well when sprinting or hoping over things in the road. I commute on a fixie, its technically dedicated to commuting but I still don't want to turn it into a barge. It is a beautiful bike and I have spent a lot of time building it. 

I commute in phoenix... it would be hilarious to wear my work clothes on my commute...