He's a top 3 talent development coach in the NBA.
He's a top 5 defensive coach in the NBA.
He's a top 5 offensive coach in the NBA.
He's a top 5 play-caller in the NBA.
He doesn't make a fool himself on the sidelines. He's active in the community. He focused on developing people and their character, not just basketball players. Media seems to like him. Players seem to respect him. Coaches copy him.
Love Brad Stevens. I admire him and want to be like him. If/when the Celtics win a championship, the structure and support he provides to the players and their talent will be a big reason why.