When downloading new apps from the App Store, all purchases are authorized with Apple Pay instead of having to type your iTunes password.
One-handed zoom, one of my favorite little features on Google Maps, has finally been added to Apple Maps. While viewing a map, double-tap and hold, then you can slide your finger up or down to zoom.
Comes in super handy when navigating while driving.
My iPhone has a ton of games that I don't have the heart to delete because I don't want to lose my progress. iOS 11's new Offload Apps feature lets me keep my game data while indefinitely removing the game so I can save space.
iOS 11's ugly Control Center totally grew on me. I love being able to customize the buttons and no longer having to swipe between Control Center and Now Playing.
Apple Maps on iOS 11 is pretty good now! Lane Guidance with voice prompts put it on par with Google Maps, feature-wise.
Not sure I fully trust it for random destinations just yet, but Apple Maps just got promoted to my home screen for commutes to work.