"Working for McKinsey is your "most desired wish"?
You my friend, are a loser."
The hubris of those who know they haven't a snowball's chance of getting in. There's absolutely nothing wrong with wanting to work with the world's most sought after consultancy (ask the CEOs of Fortune 500 companies).
My friend, I will join the 'priesthood' and despite the 80-90 hour weeks, what I'll learn in just a year will probably surpass all you've acquired in your 10+ years in a 'je ne sais quoi' boutique consultancy