All the best hackers I know are gradually switching to Macs. My friend Robert said his whole research group at MIT recently bought themselves Powerbooks. These guys are not the graphic designers and grandmas who were buying Macs at Apple's low point in the mid 1990s. They're about as hardcore OS hackers as you can get.Graham's article does a good job of describing why I went with an iBook when I needed a new laptop back in December. You get a wonderful, seamless GUI but you also get the power of UNIX. To top it off, you have a plethora of commercial applications, and all of this runs on some very nice hardware.
The reason, of course, is OS X. Powerbooks are beautifully designed and run FreeBSD. What more do you need to know?
I've found that most of the time I spend on a computer at home I'm using the Apple. It's partly the fact that as a laptop with a wireless connection I'm not limited to any specific location in the house, and it's partly the fact that the box is just a joy to use.
For most home users it is my not-so-humble opinion that a Mac is now a better choice than a Windows PC, as long as you don't have any hard-core gamers in the house. You get an easy to use, very solid, and secure OS, good hardware, and you don't need to be concerned with viruses and spyware. A coworker of mine has a PC repair shop that he runs on the side and tells me that about 65% of his work is cleaning up infected PCs. As long as the applications you need are available on Mac OS, why bother with the aggravation of Windows? And as much of a Linux fan that I am, there are still some rough edges -- printing in particular -- that make it trail behind OS-X for the majority of home users.