I don't want to sound really spoiled, but I want an iPhone 6.
I do not know about the iOS, but I very like the solid and slim case design of iPhone. I have android Jelly Bean and satisfied with the Android features, but not with the case and design of my Samsung Galaxy Chat.
Sometimes I turn it off accidentally, or I approve an update and it needs to restart. That would be the only time I would feel obligated to turn it off.
My friends used to make fun of me when I had my first phone because I would call someone, usually my parents, and then immediately turn my phone off. It wasn't until high school that I started leaving it on all day.
Like never. Sometimes when I have a software update it will obviously restart. Only once or twice I have turned it off just because. It doesn't use much power when the screen isn't on plus even when the screen is on it has a great battery life.
The button that turns the screen on and off doesn't work so the only way to turn it off is to take the battery out and the only way to turn it back on is if I have a charging cable handy. ie it only gets turned off every time I drop it.