Question:
With Windows prior to Windows 8 - what did you use your Start Menu for?
I can guess at your answer:
To launch applications.
I don't understand why you are now trying to "use" your Start Menu, when you never used to. You can still use your computer in exactly the same way as you did - you just have some slightly bigger icons to click on to launch an application, needing less precision.
I've been using Windows 8 since launch day, and I can probably count on one hand the number of minutes that I've had the Start Menu on the screen.
I use 3 monitors, and dozens of applications simultaneously, just the same way I've done since Windows NT4. Using the Start Menu simply to launch an additional application.
The improvements in Windows 8 for multi-monitor, such as the taskbar being extended to every monitor with the apps for that monitor, and the "catching" of the mouse when you fling it towards a corner, makes the multi-monitor, desktop experience better than any previous version of Windows.