I tend to go towards what I personally think will be / or is the best technology/device at the time. Because of this, I made the move to the Galaxy S3 when it first came out (from iPhone 4), and boy was that a mistake.
I don't care whether the specs of the Galaxy were far superior to the iPhone 4 (which was my current phone at the time), there is something about Android that I really didn't like. That, and the poor build quality of non-apple devices.
So after using it for about 2 months and giving it the benefit of the doubt, I got myself an iPhone 5 and will never look back. I have made the mistake of leaving iOS and iPhones twice now (both for an android device), and both times, I have been thoroughly disappointed.
I don't care what they say, there is no way the Galaxy s3 is better than the iPhone 5 - and I have used both quite a lot!