This is a great roundup of what traits you need. One other I will add is the ability to give and get feedback. This is slightly different than "plays well with others" because it is the ability to take and iterate on feedback from 1. your market, 2. your potential users 3. your friends and family and 4. everyone else.

This is helpful in the early stages for product justification but also later on when larger decisions come up. You have to know how to seperate the advice from those that just don't believe you can achieve what you set out to do.

This is turning into its own blog post so ill stop there...