I freely admit that I am fiercely loyal where my employer is concerned, but my loyalty pre-dates my employment. I was a big fan of Microsoft long before I went to work for them, which was one of the reasons why I was so thrilled when they offered me a job.
My affection for Microsoft goes back to then they were the "Little Guy" standing up to "Big Bad IBM," and at the time everyone loved Microsoft for that reason. (At that time, Macs were still pretty much toys.) But I became a huge fan of Microsoft when I started working in IT departments in the early to mid-1990s. At the time, the licensing fees for WordPerfect, Lotus 1-2-3, Ashton Tate's dBASE, etc., were astronomical, and our little IT budgets spent more on those licensing fees than we did on hardware, so our PCs were sub-par due to price-gouging. Then Microsoft came along and offered all of Microsoft Office with per-seat licensing that was 50% less than any other single software application, so we suddenly had software for every PC and budget to buy more hardware. This cannot be understated - Microsoft made it possible for us to actually focus on having great computers. To us, Microsoft was the greatest company on the planet.
By way of contrast, let's take a look at what Macs were like. In each place where I worked, we had some Macs, and the experiences were nowhere near similar. First of all, the Macs were hideously over-priced. (And they still are.) When a PC died, the data was nearly-always recoverable, and usually the majority of a PC could be salvaged as well. (It was usually only a single part that failed.) Not so with a Mac - when a Mac died (which was just as often as a PC), the user's data was gone, and we couldn't fix the computer because we couldn't walk into a store and buy over-the-counter parts for a Mac. When a brand-name PC failed, its manufacturer was generally helpful with troubleshooting and repairs, whereas Apple had one answer - send us the Mac and we'll get to it when we can. Seriously. Apple was so unwilling to help their users that we grew tired of even bothering to try. We just boxed up dead Macs and sent them (at our expense) back to Apple and forgot about them until Apple got around to shipping something back to us.
To be perfectly honest, I really tried to like Macs - and I used one for quite a while. I had heard that "Macs are better for [this reason]" or "Macs are better for [that reason]," but in my actual experience most of those claims had little basis in reality (with a few exceptions). Macs simply had a loyal fanbase of apologists who ignored the bad parts of their user experience and evangelized the good parts of their user experience. (Which is pretty much what I do for PCs, right? ;-] ) But after months of using a Mac and wrangling with what I still think is a terrible user interface, coupled with the realization that I could be doing my work considerably faster on a PC, it was my actual use of a Mac that turned me off to Macs in general.
I realize that a lot of time has gone by, and both Apple and their products have gotten better, but years of abuse are not easily forgotten by me. There was a time when Apple could have won me over, but their sub-par products and crappy customer service lost me. (Probably forever.) And make no mistake, for all of the blogosphere regurgitation that Microsoft is a "monopoly," Apple is one of the most-closed and highly-controlled architectures on the planet. What's more, prior to the release of OSX, Macs were a tiny niche, but for the most part they were a social experiment masquerading as a computer company that failed to reach more than 5% of the desktop computer market. In short, Apple was a sinking ship until Jobs returned and Apple saved itself through iPod and iTunes sales. This gave Apple enough capital to abandon their failing computer design and rebuild the Mac as a pretty user interface on top of a UNIX operating system. This was a stroke of genius on someone's part, but you have to admit - when your 15-year-old computer business drives your company to the point of bankruptcy and you have to save your company by selling music, that's pretty pathetic.
Ultimately, Apple users are a cult, Steve Jobs is their prophet (even though Woz is the real hero), and Apple products have always had half the features at twice the price. And that is why I don't like Macs. ;-]