I remember watching this awkward guy, years ago, doing these tech videos and I laughed at how uncomfortable he seemed. Since then, I've watched every one of his videos and forgotten most of what I learnt from aforementioned awkward man.
I gotta say it's the battery, there are flagships that have a tiny bit more, but a removable battery is amazing, they were taken for granted and it's awesome being able to swap it out when you've no time to charge and need more power.
Favourite thing has to be the metal casing, I don't care about the extra weight, I can't stand something much lighter, and it gives it such a beautiful, elagent look.