Shimano M324 Combination Pedals are an excellent choice for people who want the best of both worlds. Works only with SPD type clips, but has a flat side for normal shoes, or pedaling with MTB shoes on icey days if you can't hold your nerve. I prefer to ride with SPDs so my foot doesn't slip and bash my shins, never fun, but these pedals mean I can nip to the shop in any other shoes perfectly comfortably.