I buy Apple because it just works, and if it doesn't then the customer service is second to absolutely none. My iPhone 5's lock button went a bit dodgy about 9 months. It took me the best part of 30 minutes to get a like-new phone and be on my way afterwards. There's now a scheme in place for all with an iPhone 5 to have their lock buttons replaced if theirs was one of the minute percentage who received faulty lock buttons.
They're simple enough to get one for my technophobic mum and for her to be able to use it efficiently. On top of that, it's the usual best app selection, best OS stability, best build quality etc. etc.
In contrast, my dad just picked up a new Nexus 5, touted as being one of the best Android phones ever available, and from downloading a keyboard app with hundreds of thousands of 5-star reviews, he's already contracted some kinda malware. He even had AVG running! On top of that, his phone won't automatically push sound into his headphones and his apps crash left, right and centre. The only reason he has one is because he's:
a) too anti-Apple to buy an iPhone
b) needs Android for work - he develops business android apps (primary one, I guess)
I'll be buying a Mac for uni because, after buying a Win8 family laptop, would have to commit ritual suicide if I had to use that waste of 1010101010111010101's again. I could use Linux, but that's too much work; I want an OS which works out the box and which doesn't require maintenance. I run Ubuntu alongisde Vista on my home PC - I prefer Vista. That's saying something.
EDIT: Anybody who tries to play the 'innovation' card; what about 64-bit mobile processors and sapphire displays etc etc. that are going into their phones?
Does it look like LG or Samsung are innovating to you?
You're like daft investment bankers - you expect growth year, upon year, upon year. The car industry has been putting diesel engines into cars for 80 years - why haven't we 'innovated' more and found something more efficient? Oh, we have? Minor, incremental updates including the revision of the constituent elements of the fuels and engines used? Not hydrogen powered cars though - not innovating enough. Shun them. They're rubbish.
^ Doesn't sound very plausible, does it? About as plausible as you sound when you say that tech companies have to produce new products every 4 months.
tl;dr? I buy Apple, not as a fanboy, but because I have no other viable options for my needs. My needs? Simplicity, speed and good after-purchase support.