I definitely have quite the Apple ecosystem going at my house (2 MBPs, 4 iPads, 3 Apple TVs, 2 iPhones and 3 small iPods). Of all the devices the iPhone is my least favorite for 2 main reasons - size and battery. It looks like the size issue will be resolved with the iPhone 6. I am doubtful the battery issue will be.
I am with those who would prefer a thicker/heavier phone with a much improved battery. If it weren't for the iCloud apps (calendar, reminders, etc), I would be very tempted to explore other phone brands. I am not on the phone quite that much but every day it will drop below 50% so I am charging it every night. Some days, it doesn't make it until bedtime. I honestly don't know how iPhones could be used as a business tool as it barely lasts long enough for the average consumer.