Hanging is the best way to dry in my opinion. They dry evenly and do not suffer any damage that can be caused when laying buds on nets, like knocking trichomes off. Buds that are dried lying down also come out flattened/squashed on one side with moisture build up to, which can lead to mould. Turning the buds to lessen the flattening just knocks even more trichomes off. Buds that are hung to dry also maintain their shape, appear larger and as the leaves droop down and fold around the buds like a wrapper, they help prevent trichomes being rubbed/knocked off once the buds are dry.
Hope this helps, Organoman.