Fun only happens when a safe environment is created for the team by the team leader. We are most free to have fun when we feel safe enough to be ourselves. A team that embraces the individual personalities that make up the team will be the most fun to be a part of.
Everyone gets to be themselves within the framework of the team. This doesn’t mean teammates get to be themselves at the expense of the team dynamic and goals, but each individual understands that their personality is welcome and a necessary component to the identity of the team.