Well, I would use morph targets for eyelids, as I think it would be unnecessary to rig them with bones, but bones would also get the job done. For hands, use bones and not morph targets, as morph targets move polygons, not rotate them around an axis, so bones would do what you want there. Facial Expressions is a typical morph thing, but I guess there are areas where you might want to use bones, but a lot of the facial expressions we make are done with muscles that don't move bones (can't remember what they are called). Opening and closing the mouth is usually done with a jaw bone, but you have to be careful and set the influences correctly here, then morphs for the lip movements.