I have super wide feet, and that was the biggest factor in me ditching clipless pedals and bike shoes. About $20 for a nice pair of Wellgo MG-1 pinned platform pedals from ebay (cheaper than the clipless I was using previously), and I'll never have to drop ~100 on a pair of cycling shoes again. I ride in any old sneakers, and because of the pins, I never slip around at all.