.. According to Robert Scoble at least, so not exactly a scientific poll..
My employer bought me this and didn’t give me choice to get an iPhone (most common answer, actually, when I meet normal people outside of the tech industry).
They like the hackability of the phone. I then usually ask what their favorite language is and invariably they answer “Java.” iOS forces ObjectiveC and you need to play tricks to make an iOS device hackable.
They like a phone they can customize. Loic loves showing me Seesmic on Android, for instance, because it can have shortcuts into specific parts of the app.
They hate Apple (almost always followed by a modifier, like “I hate their smug attitude” or “I hate their closed approach” or “I can’t stand paying more for similar technology” or “I am into what a product does, not how it looks.”
They wanted functionality iPhone doesn’t offer (physical keyboard, custom keyboard like “Swype.” A specialized app like WalkBase. Or something like that).
They wanted 4G and iPhone doesn’t offer that yet.
Google’s apps are the only ones that matter to them and they are superior on Android than on iOS.
They wanted to use a carrier that iPhone isn’t on yet.
All they wanted is a phone and they don’t care about apps or other features and Android was cheaper.
They wanted an OS feature that iOS didn’t offer (multitasking, for instance).
They work at Google or a company that picked Android (like Motorola) so wanted to support the mother ship.
They are an app developer and were forcing themselves to learn Android so they could build apps for it.