I find it to be the most stable and usable of the platforms I've seriously tried (iOS, Android, Blackberry). That said, there are a few power user features I like that aren't allowed by default:
* F.lux
* FakeClockUp (to decrease animation times)
* Adblock
* Themes (because after 6 years of using them, smartphones look a bit boring)
I could get these on Android, but generally find that I must then sacrifice on form factor (I don't like very large phones), stability, build quality (this is getting better on Android though), and ease of use (Facetime with family, iMessage, etc.).
In the end it's not a single killer feature, but tight integration with my life. I might be able to do this all on Android, but it would take more time and probably more maintenance.
I could get these on Android, but generally find that I must then sacrifice on form factor (I don't like very large phones), stability, build quality (this is getting better on Android though), and ease of use (Facetime with family, iMessage, etc.).
In the end it's not a single killer feature, but tight integration with my life. I might be able to do this all on Android, but it would take more time and probably more maintenance.