This GQ profile is paints a picture of Coach Saban that’s easy to read as accurate. A bit:

Saban fully admits that his father’s perfectionism informed the process, even if it took decades for him to codify it. Big Nick’s influence also has something to do with why, even after a big victory, Saban feels less joy than relief. Saban is reaching for a standard, so there are only two possibilities: Either you did what you were supposed to do, or you fell short. If you fell short, you go work harder and better to try to meet the standard next time. And if you met the standard, you go work doubly hard to fight off complacency—a fatal disease transmitted by pats on the back and post-game confetti—so you have a shot at meeting it again. The process, then, is never over. Wins are not ends but merely data points that help Saban assess the state of the process at a given moment.

Emphasis mine. That last sentence says volumes.