Browser choice. Actually browser ENGINE choice. And the ability to set my own default apps, including the launcher.

F-droid. Side loading.

I can't get past feeling like iOS is more like Baby's First SmartPhone™ OS. I can get it if you're buying something for a child, or like your elderly parents or something, but it's all just too rigid, too simple, too walled in, and basically designed to keep unsavvy users from breaking anything. It's like the child-proof cap of operating systems. Android phones are more open, flexible, granular, varied and innovative. I just don't see myself ever switching.