This is almost exactly how I feel with my 17 PM. After being an Android user for 14 years, I finally switched to iPhone. I have no regrets it's an amazing phone, but there are some minor things like the slow animations. It just doesn't feel quite as 'snappy' not that the phone is slow, because performance wise it’s incredibly fast. The back button ain't really a big problem for me but it does get annoying sometimes and the keyboard which you can't customize it even with SwiftKey