I use clipless (SPD) but, after reading a few posts in this thread I decided to put some platforms on my bike yesterday. I took a 15 mile ride, got home and put the clipless pedals back on. After a few years of riding clipless, it felt weird not being able to pull on the pedal as well as push. Every time I slowed down in preparation for a stop, I still flared my heel out like I was getting out of the retainers anyway. A few times, I tried to pull up on a pedal when I was headed uphill or accelerating on a flat. Once I got some pedal bite on the back of my left calf. I was trying to engage my non-existent cleat.

All things considered, for cafe rides, family outings, and shorter rides (1 - 10 miles), and that sort of thing, a platform pedal has advantages. For my commute I'll stick with the clipless.