Thought I would make a list of little changes in iOS 9 which may interest some people but haven't been mentioned yet.
- Phone no longer vibrates when plugged in if vibration is turned off
- Siri has haptic feedback when activated (if vibration is turned on)
- Different animation when unlocking phone with notifications on lock screen. Notifications sweep upwards towards the top of the screen during the unlock animation.
- Option to set side switch as Mute or Rotation Lock
- Ability to turn off uncapitalised keyboard
- Can turn off 'Shake to undo' which I didn't even know was a feature
- The pop up bubbles from the bottom of the screen are now more rounded (when you long press a link or send a photo on iMessage)