The goal for a designer is to create arrangements that meet customer requirements. This will ultimately help to minimize or eliminate any negative judgements. To reinforce this point, the most important element that a designer must take into account is designing to the customer requirements. Other skills that help a flower designer to receive positive ratings are having a passion for flowers,and combining that love with lots of creativity and artistic talents to design incredible floral arrangements.
To get a beautiful flower design or an arrangement, you don't need to show all of these three. The most important here is that your design has ornamental flowers; you will still get a terrific and an artistic flower arrangement.