I believe the most important qualities of a successful sales representative is the willingness to be a team player. I think the power of a compatible team is underrated. A team works best when we all function our best as individual units. I kind of think of it as cogs to a clock. If each cog moves, the other to achieve a goal and achieve success. I also think that knowledge of policy and products is important. That way you can have a full structured response to any questions that a prospective client might have.