I like both, though if I had to choose between them, I'd probably go PC, simply because of the gaming support and the fact that, assuming we're talking about custom desktops, they are far more cost-effective.
Right now, I have a PC that I use for gaming and media consumption (films, TV shows, that sort of thing) that's hooked up to my TV and a 2010 MacBook Pro that I use as my portable computer (writing, some very light media editing, web browsing; fairly average computer tasks), and as an accompaniment to my PC at home. I bought the MacBook for two reasons: firstly, at the time, there were few Windows laptops that could match its battery life, and those few that did cost roughly the same amount anyway, and had either inferior or identical hardware. My other reason was, in all honestly, I was going to be spending rather a lot of money anyway, and thought I'd find out what all the fuss around Macs was about.
I've never regretted my purchase. Since buying into the ecosystem, I've really enjoyed using OS X. It's subjective, obviously, but I've genuinely prefer the user experience. I'm fairly sure it's. at least in part, down to the keyboard and trackpad, particularly the trackpad, which are far, far better to use than any I've had experience with on Windows laptops. Chiclet keyboards similar to Apple's are becoming increasingly common on more premium laptops, and I'm all for that, but as far as I'm aware, the trackpad still hasn't been matched.
On price, I'll agree that you pay a significant premium, but it's not as significant as you might think, providing you compare the right models. With regards to desktops, iMacs and Mac Pros, the premium is both large and somewhat ridiculous. I doubt all but the most devout of Apple fans would debate you there, though they would be perfectly fair in accepting that premium; the aesthetic design, Mac OS X, warranty and general fit and finish are just worth it to some people, and that's understandable. Equally, some people rely on Macs for their work, and have no choice but to pay the extra.
The new MacBook Pro ('retina' display and all) is absurdly expensive, but equally, its specs, when compared to those of other, similarly priced laptops of similar size, are both impressive and somewhat unique. While I've never liked Apple's 'retina' marketing, the display is undeniably impressive, and without compare in the current laptop market. Equally, the relatively large SSDs, Ivy Bridge processors and Kepler GPU (a 650M, I believe) are all currently premium, relatively uncommon features, and make the seven hour battery life that much more impressive (well, not the SSDs, but you see my point). And then there's the matter of size; I challenge anyone to find a similarly specced laptop with the same weight and thickness. Does this make it worth the price? Well, to most people (including myself) no, but there is a segment of the market with both valid uses for, and the cash to afford, those features.
When you enter the ultrabook market, things get a lot more interesting. The MacBook Air, particularly after the recent price drop (the new models cost £100 less than the old) is priced competitively with other laptops in that category, with similar (or superior) internal hardware, the same superb trackpad and keyboard that have made using my MacBook Pro such a pleasant experience, and best-in-class battery life. If you're shopping for a ultrabook, you expect to pay a premium anyway, and at the moment, provided you don't rely on certain Windows-exclusive programs (and even then, you can dual boot very easily), I really don't see why you wouldn't consider, and be strongly tempted by, the MBA.
As ultrabooks are quickly becoming the go-to machines of journalists of all varieties for work (incredibly thin and light, impressive performance, particularly for the size, and lengthy battery life: all features that come in particularly handy in a profession that involves a lot of travelling, whether to and from developers and events, or simply to and from work, as a lot of journalists - particularly those in the gaming industry - do a lot of work from home), there is at least one class of legitimate professional that doesn't do much in the way of video editing, that still has a good reason to go Mac.
And then there's simple personal preference, which is far too often overlooked as a valid factor in one's choice of, well, anything.
I've been thinking about this subject a lot lately, and could go on, but most people probably haven't even read to this point.
To finish, I'd just like to point out that there's no love lost between me and Apple. I've never really liked the company (though, honestly, I've found that it's best to avoid either hating or liking a particular technology manufacturer all that much; it limits your options) and have absolutely no loyalty to them. I use an Android phone, and have a Windows gaming PC. Equally, I own and use a MacBook Pro and an iPad.
