If I just used a computer for a word processor, excel, internet and email, I would go with a PC. But my devotion to Mac is based purely on software for work. Lots of useful bits and bobs that I can only get on Mac, or that are far cheaper than the PC equivalent. So the initial costs were higher, but I saved on licensing costs. I personally don't use Microsoft office at all and don't need to. But the Mac interpretation of excel (Numbers) is really horrible if you need to do any macros or owt a bit more complicated.
For everyday stuff, photos, music etc my Mac just works and is really easy and instinctive to use. For work stuff, I have to put in a bit more work to track down what I need - but when you find it, it works well, is usually cheap, and often I am surprised by the genius of what can be done.
Also battery power on my MacBook Pro is incredible. I can get 8 or 9 hours out of it if I am not processing too much stuff at once. I have to travel a lot, and this is a really big plus to me.