I did for a while, but I switch to platforms in the winter. One year I kept the platforms on for a while, and when I switched back to the SPDs I realized that I didn't much care one way or the other, and with the SPDs if I wanted to jump on the bike and go down to the corner store for a gallon of milk I had to go into the back and change shoes first, then change back when I got back, so I just put the platforms+toe clips back on and left them there.