Actually, a lot of Mac users use Macs for the simple reason that the Mac is better for their needs than a Wintel PC. My step-mother is a very good example of this. She just bought an iMac, and I flew out to migrate her work from her PC to the new Mac.
The simple fact is that the Mac is simpler for her to deal with. She can do things on the Mac that she was never able to do on the PC. It just makes more sense to her. I would get calls 4 or 5 times a week to help her solve problems that she was having with her PC, but I have yet to hear anything bad from her about the Mac.
Of course, you'll probably say that she should have learned more about the PC. The problem is that some people are just hardwired differently: That attitude is like saying you should "learn" to be a composer. The simple fact is that she's a graphic artist and since moving to the Mac her productivity has increased about 3 fold.
And I was advising her to upgrade to a new, faster PC. I found a nice one with a 20" wide screen monitor for just over $500. But she paid about $1500 for the iMac (with the extended warranty), and she's glad that she spent the additional thousand dollars. It was worth it for her. And, I suspect, for many other Mac users.
BTW, my favorite part about these threads is when people who know NOTHING about what the users' needs are tell them that they should be using something or another! What a hoot!
Mark