I think that if the apple app store wasn't so much better than the other options, I might consider a windows phone. But the app store is enough to keep me on apple for now.
Would you be an iPhone customer if the other app stores were identical? (and the apps ran as smoothly as on the iphone)
I've been using a Galaxy S3 for the last 3 months and apps do run as smooth as the app store. Even more smooth in some cases.
I've given it a great deal of time and in the end I've found interaction and simplicity is the biggest factor.
I use all Macs at home, Mac at work, wife uses iPhone, kids have iPad, Apple TV, air print printer, etc.. I obviously like Apple products and Android or other devices simply don't interact with them as well. Speaking from a phone alone perspective. I could be happy with either.
My biggest thing I like with Android over iOS is the freedom. Beyond an open system, In the 3 months I've learned to flash cyanogenmod 9 and 10, root, flash leaked Jelly Bean roms, etc.. I see it sorta like iOS beta builds though. The same as I get tired of iOS looking the same. I'm getting tired of titanium backups and restores, waiting on stock jellybean to be released, etc.. At some point you just want to use the phone as is and despite the improvements it could use. iOS works best to me.
I am happy to say I've given android a very thorough test.