Junmyeon has done a lot of bad things in his life and if only he regretted them. He has a temper that doesn't really ever make itself present unless it's absolutely necessary. Becoming King of the Moon Kingdom has made him wiser and very perceptive to people and their needs and/or wants. But no one ever really knows what he wants and desires. Some think they do and Junmyeon will tell them they're right even if they're wrong. Secrets are all he ever has and those are the only things he'll never share. To sum it up: Junmyeon is not a bad person, he's just bad at being good.