Seeing as how my answer was a personal opinion, expect my reasons to be subjective. The iPhone 5 looks, feels, and is a more premium device. From the choice of materials to the level of polish and detail, it screams high-end. iOS is also undoubtedly better than TouchWiz, which looks mediocre and gimmicky, and adds nothing to Android but slower system updates and ugly skinning. Beyond that, iOS offers far more ease-of-use, an unassailable App and iTunes Store, better support, and has several advantages over Android. Some swear by Android's customization and features, but all I see is a bigger learning curve, more time spent trying to tweak the phone to work ideally, and some niche features like widgets, peripherals, removable batteries, and microSD cards. I'm sorry, but those features are hardly compelling. Apple's ecosystem is vastly superior to Android's, and has integration with iWork and iLife (I use GarageBand). As a whole, I feel iOS is just a much better mobile OS, though I still see the merits of Android and WP8.
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Not ignorant, just my viewpoint. To each his own, good sir.