As a diehard iPhone User (Original, 3G, 3GS, 4, 4s, 5) - I'd like to point out that the iPhone isn't without it's "GPS Battery sin" also. 90% of the time when my battery goes crashing to zero (while simultaneously heating up the chassis), it's some crappy (or even quality) Application sucking on the GPS in the background without me wanting it to. DarkSky (Weather App) has been a bad culprit recently, but there have been a host of them.

My single most desired feature of the iPhone that I know I will never, ever, get - is a list of how much power each app has used in the last 1/2/4/12/24 hours. I understand that data is available through xcode telemetry, but Having to search for purple icons throughout the environment, reboot your iPhone, switch into Airplane mode - just to get full control over your battery gets old after a while...