I have to get comfortable with the new feel etc before I got without a case. I did drop my Note 5 once, wasn't a bad drop, but on concrete. It had a deep scratch in the metal band around it, right above the spen hole, but no scratches or cracks in any of the glass. My volume down button seemed to not be responsive enough and Samsung fixed that. Fortunately they had to replace that metal band around the phone to fix the button.
So...no scratch now. The only screen I have ever damaged was my Note 2. I dropped it on the same driveway in the same place and it hit on the corner and cracked the screen. It seems to me the glass from the Note 5 is much more durable than I would have guessed. The N7 should be better.