The one thing that still keeps me from Android is that the iPhone, in my experience (and I have used both extensively), is a better phone. As in for actual calls and texts :)

I predominately use my phone for that (calls, texts, email, internet) and apps are only a minor benefit (I use them infrequently).

At some time in the next 2 or 3 years I will change to an Android handset - the OS is improving no end and once the phone functionality is better it will be a no brainer.

EDIT: just to reiterate (for the downvoter...) I think the iPhone is a better phone functionality. I know others prefer Android - it's a personal thing.