Money can start a business, but ability keeps it going. A good team player. A partnership, regardless of the number of partners, is a team sport. Partners must work independently when necessary, together when beneficial. Good people skills.
Good partners get along well with all types of people.
They treat others with respect and are enjoyable to be around. Can control their emotions. All partnerships will have periods of stress and strife. Good partners control their anger, keep cool under pressure and don't overreact. Everyone profits by improving listening, speaking and thinking skills.