I don't remember this guy ever looking happy. Skiles always gave a serious, intense, tough guy look. Smile or no smile, this guy didn't take any crap. You either play by his rules, or you'll be sitting on the bench.
Just ask Jamal Crawford or Skiles' fashion-icon (NOT) Ben Wallace. They'll tell you.
Skiles took over once Cartwright was fired. And the next season, he helped the Bulls see their first light of the playoffs in seven years (even after a discouraging 0-9 start).
He taught the Bulls that defense wins games, not big name players (the Bulls had no standout players, but Ben Gordon later emerged as he became a leading scorer).
Did you know that the Bulls ranked No. 1 in the league ('05-'06) in defensive field-goal percentage? The following season they ranked second. Both times they made it to the playoffs.
Skiles not only coached defense, but fundamentals as well. You can say the Bulls were pretty young, and Skiles used that youth to push the ball on offense and be aggressive, out-hustling other slow-paced NBA teams.
His old-school coaching worked as the team produced, but it didn't work to keep his job. One slump in the NBA, and you'll get the boot.