Its a known fact silly people with more money & sense buy apple products, this same group is scientifically more likely to contract HIV too - New Scientist
On a serious note, I love the input into android systems, they are very versatile, manufactures can develop so much more for it, from the UI, to the hardware and drivers, where iPhone is just a given product that is worked on through software in its lifespan. Which is where I find it disappoints.
I'm not a windows fanboy, I actually hate what windows have done to their OS since xp and what they made their mobile/pda OS too, only thing I like is XP and the xbox. I'd actually be very likely to buy a mac pc further down the line or actually try linux again as it has come a long way for this reason, but phone & tablet wise I do prefer the android os to the iphone.
Its down to choice, you can play around with the s4 handset and if you don't like it, then return it within the given time of when you get it.