Could you go back to Windows 7 ?

I've been a Windows 8 user pretty much since launch. I bought the upgrade the day after launch and haven't really looked back. I admit I still use the desktop more than 'Metro', but I'd miss the few W8 apps I do use as well as the speed and actually the Start screen if I went back to Windows 7.

So could you go back to Windows 7 ? What would you miss about Windows 8 ?