I now use Apple computers because of one simple thing: they're just plain awesome. I love the way it works, and with few complaints, it just works. I know it's a cliché statement, but it's true for the most part... It just does what it's supposed to when it's supposed to.
Now, why did I first start using Apple computers and Mac OS X? Easy: because I couldn't stand Windows in all of its craptastic incarnations. That operating system is the most frustrating, ridiculous piece of crap software I've ever made regular use of. I found myself left and right cursing the absolute stupidity of how idiotically incompetent they must have been to make the OS so unstable, so inefficiently, so bug-ridden.
Seriously. I have a regular PC system with new hardware. It's a standard set of hardware that millions of people use all over the world, I'm sure of that. It took me, NO JOKE, 10+ installs to finally get a working Windows system on the machine. And by working, I don't mean "fully." I still can't update my Vista install because it installs the same 45 new updates every single time it reboots!! Holy friggin' crap!! Honestly!? Every single time, the same updates, installing over and over and over.
Well to make Vista and XP laughable at how they could never properly install on my fully functional standard hardware, I actually installed Leopard on my PC machine (Hackintosh). Guess what? After swapping out a DVD-ROM that wasn't compatible, I got the install to work the first time I tried. My Leopard install is still running nearly flawlessly on my PC hardware, and I've updated it with all the latest updates. Virtually ZERO problems. Every now and then my USB devices need to be unplugged and plugged back on in startup, but that combined with a non-functional sleep is the limit of my problems.
I couldn't stand that absolute piece of trash that Microsoft produces, so I went to Apple and started with an iBook G4. Loved it. My more powerful desktop Windows XP machine was collecting dust as I preferred my iBook to it at every turn. Finally I just unplugged my monitor from the desktop and plugged it into the iBook. I sold the desktop for $100 just to get rid of that piece of trash.
Monetarily Apple machines are more expensive. Sure, they got style and design and some convenient features, too (remote, blue tooth, webcam, magnetic power cord connection, etc). But overall a bit expensive. That's why I love my Hackintosh, I've got 3.0GHz with 8GB of RAM, a nice 8800GT graphics card, 1.5TB of HDD space, and room to grow and update for all around $800.
To get what I have in a Mac Pro, it would cost over $4000. Sure, the Mac Pro would be a much more powerful machine with better processor and RAM and whatnot, but still, there is no alternative to trying to get what I have in anything other than an extremely overpriced Mac Pro.
I have Windows Vista installed on my PC desktop. So is Leopard. I use Leopard most of the time, switch to Vista only to play a game like Crysis or something. Windows to me is like a video game console. A really, really, really, really unstable console. I have a PS2. I pop in a game, it works, no problems, piece of cake. With Windows, you have to fight it to get it to work right. It doesn't like you. I try to copy files from one folder to another on the same HDD and it crashes. No, that wasn't on my current install, that was my last install before reformatting. No hardware problems, I checked. Leopard is now using the same HDD problem free for months.
Sometimes when I start a game it will just hang endlessly. I checked everything out, no hardware problems reported. I've reinstalled countless times, it just will NEVER work right. NEVER. Some people claim Windows works for them without a problem. GOOD FOR YOU.
It doesn't work for me so that's that. Apple is much, much better anyway.