I'd love a "power user button"
Historically I think every major Windows version change has invoked some "I don't want that and will use the old version forever" comments.
I'm one of those. There were some programs that didn't run on XP any more and I used them a lot in Win98 times. I finally switched to XP in the end of 2006 (using the IE6 up to the end of 2010, switching to FF3.6 afterwards, changing the look (up to the icon!) and handling to about exactly the ones of the IE6 - just having a newer enginge behind it)
Still I have an old computer (in this case: A laptop from 1999 or so) and it has Win98. I really like using it sometimes
Still XP offered some nice features: You didn't have to install every USB stick any more - just put them in, wait a few seconds and they work. Installing programs got much easier in that time. Still I switched XP to the old design.
Then Vista came and I just skipped it. I was using it a few months at work and it was OK in terms of customization. Old design, old start menu, quick launch bar hidden on top of the desktop.
I'm still using XP on my old desktop and my netbook.
Then Win7 came and my old desktop was just... old. I bought a new computer, wanted to use the full RAM and so I chose Win7. First of all I changed all the settings to what I'm used to - old design, old task bar, got CWSM for the old start menu, switched off all the graphical effects on the desktop. BUT I couldn't get the quick launch bar out of the task bar any more. Damned.
On my laptop Win7 was pre-installed.
So I have 5 computers at the moment:
All of them looking very similar*. Just having the Quick launch bars in the task bar in Win7 and on top of the screen ("automatically hidden" + "always on top") in any other system in order to keep the task bar clean.
Oh yes: A Linux system on an external HDD
Now Win8 looks too different to me... I'm not using any smart phones or something similar and if it can't be adjusted to what I'm used to I guess I'd have quite some problems using it...
(OK, Imost people I know are using Win7 by now and on their computers I'd have some problems, too. I like my "old look".)
"WOW! Are you still using Win98??" - "Nope, that's Windows 7..." (<--- Yeah, I was really asked that)