Smart people welcome different perspectives and see opportunities where most do not. They see the mind as a parachute -- it works best when open. Smart people are comfortable in paradoxical situations and have a passion for problem solving and fixing things in new and inventive ways. They are willing to listen to different points of view on how to strategize in problem solving situations. They let go of having things be their way when they come across more effective solutions.
Open-minded persons also broad-minded and tolerant.
To be open-minded is one of the positive character traits.