Whether you want to use Metro in all its glory is up to you of course but for those who want avoid this interface as thoroughly as possible, version 3.5.1 of ClassicShell brings a useful new feature: it can now
Bring back Windows start menu with Classic Shell
Update, 06/04/2012: Classic Shell is still working on Windows 8 Release Preview, build 8400. I have already posted an entry about third party applications that reproduce the missing Start button in Windows 8, but neither of the two was enough