As coaches, what frustrates you, embarrasses you, annoys you, or brings you to the edge? I'm not talking pet peeves (e.g. traveling on the perimeter).
If you don't care, it's unfair to your teammates. You are accountable to the team. When you don't know your assignment or the plays, it speaks volumes.
The best way to get respect is to give it. The best predictor of future behavior is past behavior. When you disrespect your parents, your teammates, or your coaches, why would you expect anyone to respect you?
It is not about you. Get over yourself. The team matters. Teammates matter. Coach Wooden remarked, "Happiness begins when selfishness ends."
Maybe great players can get away with bad body language. We can't. The majority of communication is non-verbal. Lead. Act like a champion.
If you intend to stand around on the court, then expect to sit next to me during the game. "Lack of effort means lack of minutes."