The author puts forth the following as nine essential characteristics one must possess to make a good software user experience designer:

1. A Deep Understanding of Human Psychology & Research Methods
2. Competence in the Basics of Graphic Design
3. An Awareness of and Interest in Technology
4. Verbal & Visual Communication Skills
5. Moderate Familiarity with Business, Deep Familiarity with Your Business
6. The Ability to Quickly Learn a Subject Matter Area
7. Mediation, Facilitation, & Translation Skills
8. Creativity & Vision
9. Passion

Nine Essential Characteristics of Good UX Designers