I prefer the PDM324 for all around use, the platform side is wide and offers great traction with just about any shoe.

With bikes that always get ridden with clipless pedals I prefer double sided save for my road bike that has Look pedals but those are nicely weighted and supremely comfortable and also have adjustable float that can be modified as you ride.

I have Crank Brothers Candy pedals on my mountain bike... they are double sided and shed dirt and mud better than Shimano SPD pedals.