I've ridden with toe clips, SPD cleats, Look cleats, and platforms.

From a strictly performance viewpoint, I find foot attachment overrated with a few exceptions: Cleats are essential on my recumbent (because gravity doesn't keep my feet on the pedals), very helpful on my tandem (where the stoker is liable to make the pedals move unpredictably) and somewhat helpful on other bikes (they're good for bunny hops, for example). I don't ride fixed, for which I understand foot retention is essential.

With those exceptions, I find all foot attachment to be quite unnecessary. I know you can get a more efficient pedal stroke, but I don't believe (m)any of us really do. Similarly, I know you can pull up on the pedal and get an amazing burst of power, but it's a short burst of power because it deploys a muscle group that doesn't otherwise get used very much and very few of us are actually interested in developing it. The few times I've done long group rides using platforms, and found that every time we stopped, I was ready to go as soon as the light changed, but then I had to wait --sometimes surprisingly long-- for everyone else to clip in.

Bottom line, I let my C&V sensibilities dictate. Give the bike the pedals appropriate to its vintage; if it has Campy NR, then use clips.