UK psychologist analyzes Bush: authoritarian personality, caged rebel

And it's pretty persuasive.

As Frum put it: "Id-control is the basis of Bush's presidency but Bush is a man of fierce anger." That anger now rules the world.
And here's where the Smirk comes from. Bush is working out his sui generis project, exorcising his demons by projecting them onto his enemies and thrashing them with the full force of the American military. He smirks because he has escaped the wrath he is dispensing.

So George, how do you feel about your mom and dad?