Originally Start8 was the first thing I know of that brought back the start menu to Windows 8. As for that......Tested it. At first I did not like it at all. I don't use the Metro unless I have no choice. I installed Start8 (http://www.stardock.com/products/start8/) before it became fully payware and use a keyboard launcher (Executor / Launchy).
Overall the resource management is great. Problems I had (consumer preview) included FF kept on crashing and IE stopped working completely (crashed on every launch) after a while. Also at the time there were compatibility issues as not a lot of things were compatible or available with Win8 support. At current there are more things available.
IMO Win8 is not bad for the price. Other than the metro it seems overall a better OS. If they had the option to CHOOSE between the two instead of force Metro then it would be even better.
Recently I also found this (http://lee-soft.com/vistart/windows-8-start-menu.html) and (https://www.pokki.com/windows-8-start-menu) which I'll probably test out.