Qualities of Good Traders

What qualities make for good and successful traders? http://www.financial-spread-betting.com/Successful-spreadbetters.html A good trader is somebody who understands the emotions of the crowd but stands apart from it. i.e. close to the crowd, but not caught up in it. A good trader understands the emotions of sensations of greed and fear but is able to take advantage of it in others. What are some aspects of your personality that make you a good trader?