I tend to compare novel revision to adding extra layers of paint. A person paints a surface, waits several hours, then goes back to it and adds a second (or third) coat of paint. Having recently done a spot of painting, I can appreciate the analogy far more than before. In fact, I would say that the writing process I enjoy the most is revision, the filling in gaps with the paint brush.
Revision allows a writer to pause and bring out distinctive character traits, dialect voices and scene setting. It enables a writer to develop stronger images and to deal with typing and grammatical errors. I tend to scribble notes with a pen when I’m revising.
Of course, I enjoy writing fresh material, but I find revision less drawn out and tiring. Today, I edited a chapter of 2,000 words, then went on to write approximately 600 new words.