From a New York Times review of Charlie and the Chocolate Factory:

The secret of Dahl's charm, and Wonka's, is that neither one seems to be an entirely nice person. Or, rather, neither has much use for the condescending sweetness that some adults adopt in the belief that children will mistake it for niceness. Dahl's sensibility was gleefully punitive; he was a scourge of bullies, brats and scolds, and a champion of unfussy decency against all manner of beastliness.
...
Mr. Depp, in a recent interview, has dropped the name of the Vogue editor Anna Wintour. To me, the lilting, curiously accented voice sounded like an unholy mash-up of Mr. Rogers and Truman Capote, but really, who knows?