This same vein of thought was present in the mind of the professor at a Brook's Institute workshop I attended who often would encourage us to take pictures about things and not necessarily of things. In other words, that which is implied often times packs a greater punch than that which is explicitly brought out into the open. The word of and the word about are inherently and necessarily quite different in their connotations. In most sentences, the former precedes a material or physical object or place. The word about on the other hand is often tied with a thought, or a feeling, or even a person.
Do you think about things or do you think of things?