There's more to successful macro photography than how close you can get. Macro photography doesn't do away with the basic guidelines, which include composition. Erez Marom expands on this subject in the following article.
Erez Marom writes:
It's hard to overstate the importance of composition. For all of the emphasis we as photographers tend to place on which camera, lens or other gear to use, there's nothing that contributes more to a pleasing image than careful attention to the framing of your subject. In this article I'm going to discuss some of the compositional techniques most applicable to macro photography.
Read more at Digital Photography Review