I'm probably a bit biased since I only ever had Android phones (and one Nokia way back when but we don't talk about those times) and it's much, much, much, much, much, much, much, much, did I say much already? prominent in my country.
But from my own experiences with friends' phones and my sister's phone / computer, I don't think I could switch to iOs now.
Some things I like to, and regularly do with my phone:
a) Dowload music of the internet on my computer and pass it to the phone via USB (or download it directly from youtube on the phone)
b) Use the phone as a flash drive substitute (I'm always with it, after all)
c) Use apps that aren't exactly on the app store
None of these are possible in iOs, at least easily without some kind of jailbreaking.
We can also talk price:
You can find decent-ish Android phones going from 400 bucks (local price) all way up to 3000 (your latest Galaxy phones and the such)
While you can find an iPhone 4S closer to the lower bound at 500, it looks fishy given the price not to mention that it's considered "obsolete" by Apple standards. Its sibling, the iPhone 5S clocks into three times that price at 1500 bucks and the 6S at even more with 2700.
It's also much more prone to get me robbed since it draws attention (every single case I've seen for iPhones showcase the apple) to the fact that I have something very expensive with me where my current phone, and the - perhaps cliché and most likely hyperbolized - "stare at it funny and you'll break" thing.
And that's all before the problem that usually comes with changing operating systems.