Try using Android without a google account.. Just having the option not to be logged in to google 24 hours a day would be a big win.
I think Apple is very similar with requiring an account to activate the phone's functionality. If I remember correctly, the 1st gen needed to be synced with iTunes (directly to a computer) and the latest iOS devices require an Apple ID.
I haven't had an opportunity to try a Firefox phone yet, but I'm really hoping that it doesn't require some cloud based account to function. Just having all my data in one collective resource bothers me.