I've got a combination of clipless and platform pedals on all my bikes, and my method is this> Clipless on road bikes and platform on everything else. For my touring bikes, I've been around the block and back with half a dozen pedals, and the ones I like the most are the Shimano Saint pedals.
They are smooth and solid, and I like them very much. The studs aren't too high or too sharp. I have a pair of the Raceface Chester pedals, which are nice, but I've had to take the studs out and round them off. They were so sharp, that they tore up the soles of a pair of my Nikes!
Then I started wearing these Adidas Trail Cross, which are really comfortable, but have a stiffer sole made from Stealth rubber. Very grippy on the pedals. Easy to walk around in as well, but they caution against them marking up your floor. I tend not to shuffle when I walk, so I've not had any problems yet.