One thing i know i seriously would never go to Apple would be changing the Keyboard. I love using slide texting, apps like Swype, SlideIT, and Swiftkey Flow are amazing apps to me and i love texting and typing like this over the old Thumb typing...This is do or die for me, and one reason i am die-hard Android.
Sounds like you have been through so much though, and am surprised you stuck with Android. Especially musicians, they usually all go Apple.
I know Google is trying to release an OS called Chrome, we will see where it goes, i know i would be interested, and it would definitely help create this "Ecosystem" you are talking about