I think creativity is about being free with ideas. Thinking outside the box and not blocking yourself by rules and formulas. I find that some graphic designers are very clinical and sometimes rigid. But if you combine a fine artists with a Graphic designer or a fine artist turned graphic designer their journey is completely different - thus being more loose and open to suggestion. Fine artists tend to be more expressive is what I mean.
I could sit and write pages upon pages on this subject, due to experience in studios, working with certain people and studing art, graphics design, animation and film.