We have already hashed this out on another thread and deemed any terms that could be said for any of the 27 Submission Guidelines are too general and do not fit the bill.

Here is the original thread:
http://www.greetingcarduniverse.com/forum/yabb2/YaBB.pl?num=1377201928/

This guideline has a very specific meaning and application:

COMPOSITION - Professionalism
Whether a photograph, illustration or digital art, the creation process must appear to have been applied with a complete understanding of the medium, giving the overall appearance of a professional greeting card. Declines may include, but are not limited to:  distracting elements and/or background, household items, snapshots of people, babies, crowds, buildings, street scenes, knicknacks, and food, photographs from moving vehicles or through windows, and children's art; i.e., messy, distorted and/or poorly drawn art.

The GCU review process is based on these guidelines, ours, that makes GCU the final authority for our purposes.  You are welcome to submit your work elsewhere, especially the creative we choose not to accept, and we wish you nothing but success in those endeavors.  We realize and respect that freelance artists need to sell their creative works via many different venues to earn their living.