Again Mr Ritholtz with very good stuff:

1) Loss cutting| defense creates edge.

2) Confidence | articulate nervous system.

3) No ego | move on and accept it.

4) Consistency | Jordan’s example (pretty much like Jeter).

5) Students of the market | never get complacent. Skill-improving mode.

The last is my favorite given the name of this blog.

SOURCE: http://www.ritholtz.com/blog/2012/02/5-qualities-great-traders/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+TheBigPicture+%28The+Big+Picture%29