Clipless - SPD pedals and MTB shoes. I'm so used to riding clipless that I pull my foot off platforms and out of loose toeclips, when pedaling hard. I can disengage just as fast as I can get my foot out of a toeclip. However, I don't think there is one "right" answer - all depends on how you ride, what you're used to, if you can wear bike shoes to work, etc.