I've got about a 25 mile round trip commute and do it via my fixed gear bike 99% of the time. Not once have I felt the need for clipless pedals. Multiple tours and century rides each year on my touring bike and again I've never felt any need for clipless pedals. As always personal preference takes the lead when discussing things such as this and there is no right or wrong answer.

I'm willing to bet that most people who give platform pedals a real chance will never go back to clipless.