Can you put it in your pocket and forget that you have it? That's one of the things that I really like about the iPhone 5. Leaning towards the 4.7" but giving the Plus some consideration.
I've played around with the Note 3 and I can text one handed but I'm wondering how you feel about it day to day? Like lounging in bed, or cup of coffee in one hand, etc.
The reachability/double touch home button is actually something I'm really looking forward to with the 6+ because I think it will eliminate this issue completely. Also, I have no problems with typing one-handed, especially with Swype.
Do you think that you drop the device more (compared to smaller smartphones)?
Will it make me look more manly?
It's funny, because I've seen some people lament that it's a funky solution for reaching the top of the screen one-handed, but as someone who has owned 5" or bigger phones in the past, I would have happily used such a feature even on something as middle-of-the-road sized as the Nexus 5 when going one-handed. I think it's a smart way to deal with the problem, personally.
How does the phone feel when it's in a tight jean pocket, and you sit down. Or you sit with your knees bent holding your shins? Trying to get an idea how it feels in all types of situations.
Do you use a Bluetooth headset all the time or not embarrassed to hold a giant phone to your head?