The Creatives And The Roles They Play in Business
This book, "The Path of Least Resistance" by Robert Fritz, is probably the best book to look to define what a "creative" person is.
Although the book is an easy read, the book appeals to people who expel a lot of energy into being creative. The word "creative" is both an adjective and a noun.
Here's a video where the author can speak about his book and philosophy.