iOS 10

One of the bigger changes in iOS 10 is the raise to wake feature, which wakes the iPhone as soon as you lift it up. Along with this change, Apple made it so you have to press the Home button to open your iPhone from the Lock Screen, which is a bit annoying when you aren't used to it. If you want to go back to simply resting your thumb on the Home button to unlock it, head to Settings -> General -> Accessibility -> Home Button and toggle on "Rest finger to open." You will, of course, have to have your Touch ID configured for this to work.

Apple added Haptic feedback to the Sleep/Wake button and Ring/Silent switch in iOS 10. This has replaced the vibration sound and sound your iPhone made when you put it to sleep using the Sleep/Wake button. There doesn't seem to be a way to bring back the old sounds, but you can disable the new Lock Sounds in the Settings app. Just navigate to Settings > Sounds and scroll down to the bottom of the page, then tap the Lock Sounds slider so it is OFF/WHITE. This will disable the Haptic feedback vibration your phone makes when you put it to sleep/lock it using the Sleep/Wake button.