Well, between the wife and I we have a macbook, an Air, 5 PC laptops (counting our work laptops), a mac mini, and a PC desktop. I use the macbook as my primary personal computer.
But, you know what? Once you have them set up, I just don't feel there is that much difference in useability between the two operating systems. However, while it may not be true that the mac offers less configuration flexibility, I do think it is probably the case that the PC requires more configuration. In other words, I think that a mac straight out of the box is more useable than a brand new PC.
One place where I think the mac stands out is in the hardware, which is well-designed and solidly-built. It definitely feels more finished than my laptops from HP, Toshiba, and Lenovo. That being said, I also have a Vaio P, which I think is the equal of the macbook in terms of design and build.
And, FWIW, I don't think the macbook Air is as bad of a machine as many would make it out to be. The wife loves hers. It has a nice screen, a good keyboard, battery life is decent, and the weight is right for travel. Another USB port would be nice, perhaps, but it hasn't been anything approaching a major issue so far. It has its limitations, but as long as you are okay with them (and the price), then I don't see any reason to shy away from it.