Well, I just moved from a 4 to a 6... So much to amaze!
Touch ID - love it, it never misses!
Slo-motion video - my gymnast will have this thing full in no time!
Siri - love her for typing for me, but to due some crap tower issue going on in town means I can't use her when I need her.
But touch ID.... Oh how I wish my Air had it!!
As a cashier for the moment, I really hope Apple Pay works well and that all NFC takes off and such. It's a pipe dream my older guests would use it... But we all have our dreams right?
I'm just excited I can use it at Disney "soon"!
Eta: I went from a Treo 650 (700? For bit as an insurance replacement) to my iPhone 4, and now the 6. There is always something to amaze when you skip so many generations!!
Ohhhhhh, and probably the most amazing thing about the 6?? The phone call quality. For the first few days every time I talked to my boyfriend he kept commenting on it on his end even. I still cannot believe the difference in this phone. Wowza!