I worked on a simply-designed wedding cake this past weekend. I got so many comments about how it didn't "look like a wedding cake". I began to really think about that, as I pride myself on blowing away convention and trying to push the boundaries (even in little ways).

A wedding cake is a representation of the first food - nutrition and sustenance - that a couple shares together as a married couple. Other than that, and the need to feed all of the guests, there are no rules. There is really no right and no wrong when it comes to that most important confection.
I think what is most important is that your wedding cake reflects who you are, who you hope to become together, and the things in life that you love. If that is polka dots, bows, the family dog and a wrapper from your favorite burger joint, then go for it! For many, this will be your only chance to specifically design an amazing cake that will play such a vital role in an event. Why not have fun?

From the perspective of the cake artist, I would much prefer to put my heart and soul into a design that is unique and challenging, than to construct a cake that was chosen based solely on a passing bridal trend. The cake designer is there to work with you to build on your likes, dislikes, and vision. Let them help to create the design for your dream cake.
So, throw convention to the wind and let loose with your inner-cake artist! On your big day you will be so happy to share that first bite of sweetness with your love - a sweetness that has been uniquely created for you.