Both my fiancé and I got the iPhone when it first came out, and have upgraded through the 6 years since – in fact, we met because of the iPhone, via an iPhone social app. I preordered the 5 when it came out and upgraded from the 4. The LTE was the best part of the upgrade for me, and I appreciate the retina screen on all my devices now, and I use dictation fairly often. For me, the familiarity and predictability are good. I prefer the smaller size of the iPhone and find that most Android devices are huge and won’t fit my hands or my pockets very well.
However, my fiancé is an IT guy, and the iOS platform – even jail broken and the early iOS 7 beta were stale for him, so he upgraded from his iPhone 4S to the Samsung Galaxy S4. He has had it for several weeks now and likes it. The camera isn’t as good and there aren’t as many photo apps that we’ve found, so he misses that a bit. Most of the apps we shared, like the Grocery IQ and DropBox, have Android versions and we can still sync our data for the app. Even our shared Apple calendar will work with his Android device.
Neither of us used FaceTime, but I have friends whose families use it often, so that ties them to the iOS. I’ve met many people via iPhone apps and sites, and a large number have tried Android devices. Those who came back to iOS seem to be the regular end-users like myself; and those who prefer the Android seem to be technology motivated people who like to explore what the device can do, like my fiancé.