I have been using Macs since high school (mind you I graduated in 1988), but when I got into the Information Technology Field it was all PCs. Whenever I wanted my Mac fix, I would have to purchase the gear on my own, and usually catch grief if I dared bring it to work. "You cant use that here!!! Its against policy" or "we don't support that here" is what I would have to hear.
As I look back, there are few times in my career whether it be dealing with PCs on the desktop side or dealing with the MS, HP, Sun, Cisco Operating Systems in the data center world, that you didn't have to be somewhat of an engineer to get things working properly. This has changed a little with Win 7, but it always seems, in order to get things tweaked the way you needed them to be productive, you had to turn into a hard core enthusiast or know someone who would take care of the tweaking for you.
Lastly, I also think that people who use Macs tend to be more of the kind of people who look at the Mac as a tool. They need to create something and the Mac is just a tool to help them along the way. The bulk of the Mac community doesn't care what speed the memory is running at or if they can overclock the GPU.
A perfect example I witnessed several months ago. My friend who is a surgeon called me up and asked that I come right over. His wife also a surgeon, needed to print something on her HP laptop and it was not working. I asked for them to describe the problem, took a quick look (somehow the printer installed itself 8 times), and thought to myself "oh man I am going to be here for hours". I then asked where the MacBook I talked him into buying for himself was hiding. He went and grabbed it, I started it up, plugged in the printer and it just started working. I know there are countless times when people plug a printer in to a Windows machine it just works as well, but it is not always the case. So, had I not been around, my buddy would have had to spend his entire morning and possibly afternoon troubleshooting an issue just to print something.
Lastly, and this just a fact, under normal circumstances, Macs just work. When I got into music production as a hobby I would spend days trying to get my music hardware (mixers, mics, turntables, soundcard) working on my PC gear. When I broke down and bought new macbook, everything worked without a hitch. I did have to downgrade a firewire driver once when a new revision to OSX came out but that was it.
I will say the general attitude towards Mac users has changed though. Now when I pull out my MacBook Pro or iPad people run over and want to talk about them.
Thats my 2 cents...
BC