Interesting interview here with a comedian from a difficult family background who has made the decision not have children; at about the thirty-five minute mark, he begins to talk about life as a childless person. Over the course of the podcast he mentions that he misses the distraction children can bring as well as the sense of meaning. At another point he discusses how being childless puts pressure on him to excel in his career field.
His wife hails from a difficult family background as well, and one of the things they agreed upon early on was that they did not want to have children themselves. I like their story.