Why Do I Prefer Macintosh?
The robustness and sophistication of UNIX with an easy-to-use interface.
All the applications you use are available: Microsoft Office, Outlook Express, Firefox, Internet Explorer (sort of), lots of games if you want them, and of course, iTunes.
And many hundreds of other reasons. Here is a website that is devoted to carefully comparing the two platforms. Make an informed decision:
Mac vs. PC Info