What I like:
- OS X very seldom sollicits the user's input. It is a maintenance-free operating system. Installing/uninstalling is a breeze. No defragmentation needed. Upgrades are painless. No need for antivirus or third-party firewall. No inopportune and arcane pop-up messages.
- the anti-aliased fonts are gorgeous (but need getting used to)
- freeware / shareware / independent developers software is top notch: Cyberduck, Rapidweaver, etc.
- the pre-installation of must-have applications and the limited choice of third-party software is a plus for me: you can be assured the quality is good, the user base is large, no need to worry about what you should and should not buy.
The minus:
- The Mac version of Microsoft Office is not 100% compatible with the Windoz version and this will get worse with mac Office 2008. I wish both versions were strictly identical in terms of functionality and interface. Leave it to Apple and others to design a Mac-like office suite. As for running Office under Boot Camp, it is a hassle. Using Parallels adds significantly to the cost.
Overall, I am a very happy switcher. Since February 2005.
less hardware support than linux