I now use a Mac at home. Here is why I made the switch.
I had just bought a digital video-camera. Editing the digital video required us to increase the processing and storage capabilities of our home system. So I set out to investigate our options, not excluding a Mac, which I had heard was suitable for home video editing.
To purchase a bigger PC was cheaper than to buy a similar Mac. To learn to use a Mac required time and effort. To learn real time video editing on either would also require time and effort. I had not been using photo or video editing software before on the PC - too complicated for me. I had had virus problems before on the PC and so the anti-virus, anti-spyware, patch upgrade routine running on my home PC was taking boot-up times to 3 minutes every time I turned the PC on. The Mac operating system takes care of antivirus/spyware/etc. The boot-up on my Mac is 30 seconds. But what really illustrated the difference for me was the instructions for the installation and configuration for video editing software. The PC configuration instructions were 3 pages long, and required the installation of a special $300 card and software from $50- $300. The Mac instructions were 2 lines long and basically said: "it all comes standard with the Mac"!
So for me the pain of daily 5 minute machine boot-ups made me open to alternatives. The expense and effort involved in configuring a PC so it could do what a Mac did out of the box motivated me to make the change. The simplicity of using the Mac and its software made sure that I did not experience buyers remorse.
I still use a PC for work, and probably always will. But the Mac will be my Home computer system from now on.