I would add #11 - Trustworthy. This is something earned by being honest, doing good work, and delivering on your promises and commitments.
Regarding flexibility, this should extend to your work plan as well. I've always been a proponent of providing at least three alternatives, providing the pros & cons of each, and then making my recommendation. If they go with my way, great. If they want me to do something else I will analyze it, point out potential issues/problems, make suggestions (all in writing), and then do as they want since that's what we're being paid to do. If what they want is just grossly wrong then it might be time to walk away. A good reputation is a difficult thing to build and an easy thing to lose, and is far more valuable than a few weeks of billable time.
Here's a link to a complementary article that I wrote a few years ago. Those interested in this topic should find the article useful as well.
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