Taleb has one good idea, a great idea even, and an infinite number of ways of talking about it. It is essentially the same idea as his last book, Fooled by Randomness: namely that life does not behave with regularity. Those who think it does, he says, will always be tripped up by the unexpected. Black Swan extends that idea, beyond the financial markets he concentrated on in Randomness, to just about all walks of life. He is a magpie for anecdote and stray pieces of supporting evidence wherever he can find them. He calls all this 'skeptical empiricism'.
The qualification is that his big idea is not original, though his numerous examples do help bring home its ubiquity. More problematically, he overstates its usefulness. For when it comes to calling your next move, the unpredictable and the unexpected are, by definition, not things we can anticipate. And though he is right that in the long run there will undoubtedly by high impact improbably events, it is also true, as Keynes said, that in the long run we are all dead: organising your life on the principle that something radical might come along doesn't solve the everyday problem of what to next.
In short, he exaggerates his own insight and the authority it gives him. That's a wicked irony, for the chief target of his ire is those with an exaggerated sense of insight and control over their lives.
Oh, and the tone... Taleb wants to be seen as a radical iconoclast. Every sentence drips righteousness and often irritation. He is the strutting, impatient sage, the rest of us blinkered morons. Apparently he doesn't like his editors trying to change this. A word of advice to the author: if you want your advice heeded, don't shout and sneer at your audience. For this reason, an interesting thesis, but in the end a wearisome read.