Nor are Macs the be-all and end-all of multimedia machines. In fact, I find the three weakest apps in the Mac lineup are the new iMovie '08, iPhoto and iTunes. The new iMovie '08 is absolutely horrid. iPhoto is not as good a Picasa. iTunes constantly locks up, creates duplicate songs and only works well if you leave it with default settings.
That being said, a few pleasant surprises on the Mac platform. For one, the wealth of shareware and freeware apps. What the Mac arena lacks in quantity, it makes up for in quality. Quicksilver, Rapidweaver, Little Snitch, Remote Buddy, Chicken of the VNC - just a few of the shareware apps I use all the time. Each one I paid $15-$30 for a license.
The other thing I love is how hasslefree it is to connect external devices. With Windows, it was always a crapshoot as to whether my external drives would be recognized when I plugged them in. With Mac, it's 100% reliable.
Finally, no BS with the operating system upgrades. You pay $100 and you get the one and only version of the OS. There's no Home, Premium, Super Duper Premium editions.
I'm glad I switched. The only thing I miss is games.