Bill Gates on Tiger:

As quoted in this Business Week article:

"You can always tell if you're working on a Mac or a PC. Just take your applications and stick them in there and see if they run,"

You're a hoot, Bill. All those copies of Sobig I get in my e-mail inbox every day? Let me expand them and run them on my Mac...

Oh, wait. They didn't work. You're right, Bill. All my Windows viruses are not, in fact, compatible with my Mac. Darn it. And you can't get programs like Spybot S&D, Ad-Aware, or even Microsoft Anti-Spyware for the Mac, either. How unfair!

Of course, that may be because there's no such thing as Mac spyware, but why confuse things with facts?

To be slightly serious, there are a few places where Mac software selection is an issue. Besides gaming. And there are legitimate uses for ActiveX applications (though they should all be written in Java instead). But for the most part, the Mac platform has at least 2-3 high-quality products in most software categories. Windows typically has more - but you aren't going to install every competitive office suite on the market - you are going to buy and use one of them. And the best ones are typically cross-platform, taking advantage of the features available on the OS you use. Microsoft, ironically, is a big practitioner of that with Office. Which is available on the Mac, and excellent as well.