Well after years of being an iOS, Blackberry, Windows Phone & WebOS user I've finally bitten the bullet & ordered a Sim Free Nexus 5! 
I've got a lot of questions about the switch and would like some advice/answers from long term Android experts.

I've got a lot of questions about the switch and would like some advice/answers from long term Android experts.
- Does Android have a native Cloud back up system ala iCloud?
- I'll still be using an iPad as my tablet device of choice and have a few Airplay devices around the house, does Android have an Airplay app/hack?
- Can I pay via NFC in stores using Google Wallet?
- Is it possible to get rid of the notification bar at the top of screen, I don't like how cluttered it becomes on Android
- Battery life, will having news and football apps etc sending push notifications kill the battery? I'm used to getting push notifications on iPhone and the battery still lasting a day.
- Is it possible to get the Moto X voice recognition and voice commands etc from the phone being off/screen locked?
- Can I store & backup photos to Google without posting them on Google+?