Does the work meet your own standards for excellence? Did you make or do the thing well? Are you happy with the work?
Does the work meet the expectations of the people who paid for it? Does it exceed those expectations? Are the customers happy with the work?
Does the work make people’s lives better? Does it make the world a better place? Does it make life even just a little bit nicer for even just one person? Is somebody happier because of the work?
Did the act of doing the work give you pleasure? Was it fun for you? Were you happy while doing the work?
Did the work challenge you? Did you learn something? Did you get better at something? Were you enriched by the work?