I switched from PC (a Dell Inspiron 5150 laptop, which is now part of a class action lawsuit re how often their motherboards fail, mine died twice) to Mac (12" G4 iBook) in Nov. 2004 and will never switch back.
Caveats: I don't use a Mac at work, in fact I'm typing this on a Windows machine. I don't play a lot of games (just World of Warcraft), but if I get the money for a new MacBook Pro I'd play more games using Windows XP on it.
The two-button mouse myth has already been dispelled by Dimwhit, although I will say that it took years too long for Apple to get on board with a practical mouse.
The "Macs are more expensive" argument is also seeing some changes. See
here . Still, for the cheapest computer out there, regardless of specs, Dell still has the advantage.
But I prefer my Mac mostly because of OS X. I use Expose, Spotlight, Dashboard, none of which are available for Windows without 3rd-party software. Spotlight is the greatest thing ever in my opinion.
And the whole iLife suite is also great (and free with your Mac!), again none of which is similarly available on Windows without the downloading of third-party programs or purchasing new software. The site in my sig was made in iWeb, for example, and took about 15 min. to set up. Whereas
this site from before my iWeb days took my a lot longer because I had to buy a book about HTML and learn the basics for myself.
I also vastly prefer apps like Apple Mail, Address Book, and iCal to their traditional Windows counterpart (Microsoft Outlook) due to stability and ease of use. And while I can't speak to TogaMario's stability issues, my iBook has never crashed, ever. The worst I've had happen was Force-quitting Safari a few times. *shrug*
Yeah, I guess I'm a fanboy now, but since I haven't wanted to throw my home computer against a wall for almost two years, I think the fanaticism is worth it.