Vessels come in all shapes and sizes and most lathe artists try to achieve a silhouette that first and foremost appeals to the eye. A beautiful form, balance, a pretty profile, outline is just one part of the whole.
Choice of material is usually of major importance. It must of course be fit for the intended purpose whether this is to exploit an example of highly figured grain or a plain wood that will allow the viewer to concentrate upon the form alone.
Finish is another consideration and to many this will mean polish to enhance some beautiful grain and to give a smooth surface.