A few years ago, Mary Beth and I attended the Psychic Structures workshop, taught by Russ Hudson. The experience greatly deepened our understanding of the Enneagram; it also convinced us that Russ is a being of light who is also totally cute. He would probably be (adorably) annoyed by our recent decision to declare him our god.
Anyway, if you would like to become similarly enthralled, he is teaching a workshop on the instincts at the Mountain Area Health Education Center in Asheville, North Carolina later this month. More details are here.