Speed: The G5 Processor (what OS X runs on) is what Apple claims to be the fastest processor in the world. They released several irrelevant and suspicious benchmark tests that supposedly "proved" that this was true. However, Apple's policy to lie about their performance still stands. ACTUAL benchmarks have proven that Mac OS X running on a G5 is not only NOT the fastest operating system in the world -- it's slower than a Dell Pentium running Windows NT 4! If you want proof about this, just conduct a google search for "Apple lies G5", and you'll see what I mean.
Security: Mac OS X (and previous versions of the Mac OS) have generally been virus-free. However, this proves nothing about Apple's capabilities of creating a secure operating system. Nobody bothers to write viruses for the Mac. Why would they? Over 90% of people that use computers use PC's running Windows. Virus writers want to infect the most amount of computers in the world, so they attack Windows instead. Nobody wants to infect a Mac because hardly anybody uses them.
Stability: Mac OS X has a FreeBSD/UNIX kernel (core). Having used BSD myself, I have to admit that it is a good, stable operating system. However, it's evident that Apple managed to cripple the BSD kernel before they used it to base OS X. I've used OS X myself and it crashes a lot more than my eMachines running Windows 2000.
Support: Ha! Apple's idea of support is a bunch of pages telling you how great all their products are. After filling out a form and submitting your problem, THEN you are told that you won't get a personal response. Thanks a lot, Apple.
Also, the fact that Mac's can now run Windows is pitiful. All Apple is saying is that their own capabilities of creating an operating system suck so badly that they have to make computers capable of running Windows. Mac users have been bashing Windows for years, and now they want to use it?
Me: *Bursts into raucous laughter at the mac user's stupidity*
Irritating Fanboys and silly marketing campaigns (albeit now Microsoft have emulated them too- see the pattern here?) cloud its actual benefits, but its largely used for its creative capabilities. And when I say, "capabilities" I mean Logic and Final Cut work only on OS X, Industry-standard programs.
A 'true' user of OS X is generally quite irritated and bemused by fanboys and marketing campaigns and couldn't careless what OS you use or how much money he/she paid for it, because it works for them and they are rather pleased no one bothers making Virus' for their OS.
Microsoft Fanboy: "yeeeeah lololol youre sooo ghey I can play videogames lolo and DOS websites, gg n00b"
"True OS X user" : "So I've got a job and get laid regularly. Both of you Sod off"
Billy: Yeah right, you can't even maximize the fucking window.