I have used both Mac and PC for the better part of thirty years. Macs just... Work better for the average non-computer science person. They generally feel aesthetically better, they crash less often, they are more user-friendly... I have never flown into a blind rage using my Mac in the same way I frequently do using the Asus we have at home.
Crash less often? Did I step into a Time Machine and get sent back to 1995?
I've been using personal computers since long before there was a "Mac" or a "PC" (starting as a teenager in 1978 on a Commodore PET).
20 years ago, Windows systems used to crash quite a lot.
But that was a long, long time ago.
I'm typing this on a 4+ year old Dell notebook running Windows 7. I keep it on 24-7, 365. I use it for work (I mostly work from home), surfing, games, and watching videos. I use it for hours and hours every day, for every conceivable application.
I can't remember the last time it "crashed." And no, that's not because I'm old and senile. :)
If you are paying an extra $400 to buy a Mac because you like the OS better, or think it will make you "cool" and help you score chicks, go for it, but if you are spending all that money to avoid a (maybe once a year?) "crash," I'd suggest that you aren't spending your money wisely.
Remember, every extra dollar you spend buying an expensive Apple product, when there are much cheaper alternatives that will do the job as well, is MANY extra dollars you won't have in retirement. Do you really need "retina display" or do you just want it because Apple has done a masterful job of marketing it?
My philosophy on buying computers: Buy the cheapest computer you can that will fit your needs. Unless you are running ridiculously power consuming software, or a hard core gamer, you probably don't need a $1,200+ notebook computer.
I typically buy mid-range systems for both Notebooks and desktops (usually in the $800 range). If all you are doing is web surfing, productivity (Office, etc) software, watching videos, and non-hardcore gaming, you can buy a wide variety of perfectly capable PC notebooks for about $800 for a 15". If you go with an Apple product, a 15" notebook will set you back $2,000.
Buy the $800 computer and invest the difference in a good no-load mutual fund.
You just need to figure out what is more important- do you need the status item (Macbook or iWhatever, Mercedes, Armani, etc) or would you rather be rich and have lower "status" equivalents (PC, Chevy, JC Penny, etc)?
The Millionaire Next Door probably ain't driving a Beemer. He ain't wearing Armani, and he probably ain't doing his taxes on a $1,500 Macbook either.
On the other hand, if you have earnings like LeBron James or Kim Kardashian, go ahead and buy the Macbook, you can afford it. But for most of us, we can't afford to buy status items and actually become rich.