Entrepreneurs/Business Owners. We fly a lot if our business(es) are scattered about and we have to be in multiple locations to manage them, or continue to expand our business(es).
Many of us are "Hands-On" and we thrive on getting there, and getting things done.
This excludes sole proprietor types that own Brick and Mortar or can manage from their computers. Many of us can't. Hence, we travel extensively.