This is a small detail, but I like how Sony put the battery percentage inside the battery icon and removed the "AM" or "PM" from the clock. It just saves a lil more space on the status bar. I had an HTC before and it was a cluster F.
Maybe not a best feature but the clock on the lock screen is actually a widget if you expand it down and tap on it it takes you directly to the clock app
One-Handed Typers: Sony's keyboard has a one-handed setting where it pushes everything to the right or the left. I usually type with two hands, but it's nice to know that the option is there.