I don't use clipless pedals for commuting. In my opinion it's too much of a hassle to change shoes when I arrive at my destination, which isn't far. If my commute were longer than four miles I may consider using shoes. However, I mainly just commute with the shoes I wear that day (black Chacos for most of the year). Especially riding around campus, I don't want to be walking around in my Shimano mountain bike shoes or Northwave road shoes.

If I do decide to take my mountain or road bike to work/school that day, I might use clipess. It's sometimes uncomfortable or dangerous when it's wet to use normal shoes on my small clipless pedals.