There are many different kinds of leaders, therefore there are no ‘set’ qualities that have to be present in all leaders. Rather an effective leader draws from a range of personal qualities to help them deal with different circumstances and challenges.
Part of growing strong as a leader is through expanding our personal qualities. When we are not strong in a particular quality it is also wise to seek the contributions of others who are strong in that quality. This asks for a complementary team. The well-organised person can help to complement the creative person, and the person with the sense of humour can complement the serious minded person.