I've read it a hundred times on BF, but I'll never understand the "unless you race, you don't need [clipless pedals / power meter / coaching / carbon frame / aero wheels / whatever]"

I race, commute, go on errands, and just ride around for fun. There are plenty of situations that had nothing to do with racing where I'm glad I had clipless pedals.

OP: I prefer SPD-SL (Ultegra or 105) pedals on my road bike, but I put SPD (two-bolt mountain style) pedals on my CX/commuter. If you think you're going to walk more than a few feet (say walking into a store or into work from the bike cage, consider the mtb style spd's)