Although every product deserves healthy criticism, many opinions of Windows 8 seem to be based on misconceptions, especially when it comes to the viability of Metro as a Start menu replacement. For the record, I don't care if you skip the update -- hell, I might pass on it too -- nor do I care if it's the most failtastic operating system in Windows' 26-year history.
However, I believe your opinion should be formed by facts, not irrational rhetoric parroted online by so-called power users and companies that want to sell you third-party programs. The truth is, functionally speaking, Metro is basically identical to the Start menu.
I've been running the Windows 8 Consumer Preview for a few months and although I'm okay with Metro replacing the Start Menu, I hate seeing the new interface by default every time I reboot. When Windows 7 starts, you hit a login screen (assuming it's enabled) and then you're brought straight to the desktop.
When Windows 8 starts, it displays a lock screen that you have to move out of the way before entering your credentials, and then you have to dismiss the Metro interface before accessing the desktop. Like I said, I'm cool with Metro, but I have no desire to see a full-screen Start Menu when I log into my PC.