The way I see it, coaches can have a number of conflicting/competing things to balance.
Winning
Individual player development
Fair playing time
Team cohesiveness
Camaraderie/fun
Needs of this year vs next year
Competitiveness/level of the team
And there may be more I'm not thinking of.
If it is a pie chart...and you can't go over 100%, what is your preferred breakdown?
(I expect it is different based on kid, age, skill level etc. It is just a discussion)