Anyone else find that other people are surprised when they see you don't have a case? A girl asked me "So you're going to get a case for your new phone, right?", almost like people are obligated to cover up their devices these days. I say nay nay. Similar to not wearing a condom, just be extra careful and there won't be any issues. If something does happen, its my own fault and I won't blame anyone besides myself.
Anyway. That said, I do usually have a screen protector on the back and front, just for good measure and so I can toss it and slide it around on the table and not have to worry about scratches.