It’s the little details that separate “good” from “stellar”. All of the planning and detail you do can be thrown off by one mismatched connector or component. Think about it, if you have a black and gold build and have a single green USB connector, that is exactly what the eye is drawn to and it looks terribly out of place. Or maybe you have a black and green themed build, with everything matched right down to some green LED RAM. An orange Cougar fan in the rear exhaust position would look, well, not very good, and that is something as simple as a single, inexpensive fan. It’s these little things, however, that put your build over the top.