Windows 8 Start Menu - Replace it with the best of both worlds!
After using Windows 8 for a few months now, I still feel the main start menu replacement is a little full-on and isn't as discrete as it could be. I suggest you try out Classic Shell. Unlike some other start menu replacements for Windows 8, it's free, and you can easily still get to the built in Windows 8 start screen by pressing Shift with the Windows key. Completely configurable, definitely worth a try, especially given the price.