Macs are easy to use, get less viruses, have above-average hardware, and has good customer support @ applecare.
I've gotten things like my power cord replaced, no questions asked, at applecare. Appointments are a breeze. Most computer manufacturers require third-party people to fix your computer, shipping it in, etc. I haven't heard of any service as good as Apple's.
You give up customization, experimenting (walled garden), but you get security, reliability, and customer service. Yes, you pay, but if you take care of your mac well, it will last a long time. I know people with the original black macbook still going strong (it's almost ten years old) with no sign of letting up.
To me, the convenience of a mac is worth it.