Have recognized leadership traits
Make good decisions
Be a great communicator
Have a sense of humor (often)
Be driven to succeed
Have great project management skills
Be able to think strategically
Be a good listener (active listening)
How does a new project manager obtain and hone these skills? My quick answer is a blend of education - perhaps successfully graduate from an MBA program, experience, on-the-job training, mentoring, and a continuous feedback loop. In order to move from good to great we must work to improve our skills and focus on our strengths; however, we must also identify and minimize or eliminate our weaknesses.
Finally, great project managers like working with people. They like challenges, they have an even temperament, and they are a motivating influence to those around them. Good PMs don’t just plan and delegate, they get involved and become part of the team.