The judging of the designers work is extremely subjective. Each person that sees the design will make their judgement based upon personal preferences for design styles and flower choices. There is no set of common criteria used in making decisions about whether a person likes or dislikes a floral arrangement. In fact, there is not a standard criteria list which is used by everyone. To further convolute matters, judging actually comes from more than just one or two people _ they come from the recipient, the customer who placed the order, and third party observers (anyone else who sees the arrangement). Therefore it is virtually impossible to please everyone with each design that is created.
Single, larger blossom flowers, such as roses, carnations, zinnias, tulips or lilies, usually make up the focal points of a piece. Taller stems with multiple flowers can balance things nicely. Delphinium, gladiolus, and snapdragon are good examples of flowers that can add extra height and texture. "Filler" flowers, or stems with many small buds, are great for topping of a bouquet with a full and delicate look.