it's not about if ain't bad it's about is it any better than windows 7, the answer is no, especially on a desktop pc.
I tried the RTM on my main PC, and immediately started wacking things like Classic Shell on to it. I didn't take to Windows 8 at all, and uninstalled it.
After I realised I wasn't going the right away on trying Windows 8. I was trying to make it too much like 7, and not trying it for what it is. I put it in to the VM server at work and got it up and running. I then customised it to something of my liking, and realised the Windows key is my best friend, and I can do everything with little to no mouse use, and it was easier to just type on the Start menu instead. I soon found myself actually starting to like it and how it all works, and may try it on my main PC sometime soon when I have more time.
1) Install the software I use on my Win7 equipment and use it exactly the same way.
2) Use the "Metro" Start Screen in the same way as I use the Win7 menu system.
I don't find that the Metro "Start Screen" provides any functionality that I don't already have. The only thing I don't have on the Win7 box is the flat looking Metro apps and Win8's flat desktop. The Metro apps (such as they are) work OK but provide what I consider duplicate functionality to what I've already got. So ... once again: I would upgrade for what reason?
Except it splits apps across multiple "task bars", obscures the entire screen for no reason, Metro apps full size on 24 in monitors for no reason, hides tons of functionality behind obscure mouse gestures or hot keys that were easily findable before, as well as the complete removal of some functionality and a blandification of the desktop.
In short, it doesn't add much if anything at all (positive) to the desktop experience, it just removes, hides, traps and rearranges everything.
Speaking of apps, I was perusing through the Windows Store in the first time since a week or so, and it seems app development is going rather steady. Anyways, I found an app that makes it all worthwhile. It's a little Star Wars app and ALL that is it is just the classic Darth Vader Nnnnnnnooooooo!!!! soundboard. Perfect!!