Former President George W. Bush talked about his values, his struggles with alcohol, and his West Texas roots at the Global Business Travel Association convention on Tuesday, but he concentrated mainly on telling stories from his presidency — and hawking his memoirs, “Decision Points.”

Bush was the day’s keynote speaker for more than 6,500 business travel professionals — ranging from company travel managers to representatives from airlines, hotels, and travel technology firms — gathered for a three-day conference at the Boston Convention & Exhibition Center.