I have just re-read this thread, as I hadn't looked at it in a number of months, and two things occurred to me.
My original remarks still stand, in that I'm in the position of many here who use -or have to use - Windows at work, but Macs for personal use (although most of what I write and research is done on my MBA and transferred, subsequently, to the office Lenovo).
The first point is that many of the organisations, companies, governments, international or supranational bodies that we work for - the very ones which use Windows on a daily basis - do not update their office computers to anything like the same extent as we domestic users do. Most of the computers I have used which have been provided by some of the organisations I have worked for have been a lot older than any of my Macs; that is because my Macs are never older than three years old. This means sometimes quite striking performance differences; my current MBA is an i7, whereas the office machine seems to lag behind this by several generations, not merely one or two.
Moreover, precisely because these are ageing office machines, and rarely 'owned' by anyone in particular, they are not treated with anything like the tender babying care some of us effortlessly bestow on our Macs; instead, the care they receive is marked by necessity and they tend to be on the receiving end of sometimes heedless and rough handling.
Unlike some of the posters here, I have never loathed Windows per se - I just much preferred Apple once I switched. In fact, I quite liked XP, (detested Vista), and, more recently, found Windows 7 a perfectly useful, completely functional, and even fairly friendly, system. Granted, not OSX, but not bad at all. I had neither complaints nor problems with it.
However, the main reason I returned to this thread is to observe that I have rarely come across anything as cumbersome, tediously labyrinthine, needlessly complicated and stupendously frustrating as Windows 8, a point which seems to have been made by some of those who have posted here earlier. Indeed, most unfortunately, my current employers are in the process of switching our entire office over to Windows 8, and I must say that it is without doubt quite the most horrible system I have ever worked with.