Team

What does it mean to work as a team? I am constantly working with others who have different ideas about what team work means. My wife and I are a great team. My current assistant and I are a great team. How is success as a team judged. I used to think that good team work meant less friction or disagreements. Now I am not so sure. I think a good team has more to do with how conflict is addressed and change occurs.
I have always seen myself as the support on a team. I am usually able to see where friction is coming from and maybe, to a fault sometimes, I can be political. I am hoping to take more of a leadership role in my school next year as a grade level chairperson and in staff development. I have seen time and again how leadership changes the leader. I wonder how it will change me. Will I still be a team player?