[Blu Vivo Air] rarson:
Personally, I never use screen protectors or cases for my phones. I still have my Samsung Fascinate (Galaxy S) and other than a few gouges in the plastic surround and some very light scratches, it's fine. That's a phone that I've dropped and outright thrown towards the ground (by accident, of course) multiple times. I would say that the Galaxy SIII just as strong, except the SIII's larger size and grippier plastic meant that it fell out of my hands a LOT less often than the Fascinate. (Disclaimer: my SIII did get smashed up, but it was my fault for leaving it somewhere I shouldn't have and it was destroyed by a very large force.) My LG Volt is a very cheap phone. It's more susceptible to scratching, as its screen is some sort of cheap plastic, but even that phone has withstood a few drops and frequent pocket traffic without any major problems.

I keep my right pocket free of everything but my phone. So perhaps if you're throwing keys in there with the phone, or other objects, your results may vary, but I always like to keep my phone separate to keep it nice, with the side benefit of making it easier to pull out without extra stuff in that pocket.

I've had great luck with the Gorilla Glass though. The plastic on my other phones definitely took more of a beating than the glass itself, and it's worth noting that when I was using the Fascinate, I was working in irrigation where my phone got accidentally tossed around quite a bit, in rocks and dirt, and it still looks great. And again, the physical shape of that phone made it much more prone to coming out of my hands than something like the SIII or Vivo Air.

I wish the Air had the length and width of the SIII, which makes it an easy phone to hold IMO, and the glass back isn't quite as grippy as the smooth plastic on the SIII, but I don't forsee any major issues having held the phone for a while now, and the Air has the benefit of being lighter which seems to help keep it in my hands a bit better (in other words, if it were the same size and shape, but with the weight of the SIII, I feel like it would be a bit more prone to falling out of my hand).

All of this being said, I think what it boils down to is how you treat your phone and what you expect out of it. If you treat it relatively carefully, and don't expect perfect glass after a year, then I don't see the problem with using it naked. If you're prone to breaking screens, then by all means get something but I don't actually think a screen protector will help you. I repair phones and tablets for a living and I see all sorts of shattered screens, yet I've never shattered a screen on my own. Personally, I'm not going to put anything on the Air because I dislike cases that add bulk to the size (the size is part of the reason why I bought it) and I feel that screen protectors do more to interfere with touch input than anything else.

It's kind of like when someone buys a TV and doesn't remove the plastic wrap that's meant to keep it looking nice during shipping, and then ten years later it's peeling badly and there's dust and junk sticking to it.. Yeah, it may still look great once you peel it all off but since it's still there, it looks like crap and it's time to junk the TV anyway, so what good did leaving that plastic on actually do? I replace shattered iPhone and iPad digitizers all the time on devices that have screen protectors on them. Screen protectors don't protect the glass from excessive shock.

All in all, I think the Air is a phone that fits very well in my hands and definitely feels grippy enough not to have to worry about dropping. Because of that, and due to its extremely sleek shape and style, I feel like it's a crime to weigh it down with bulky protectors. I'm going to use it as-is and if anything happens to it, a replacement is only $200, which is not a bad price really. I'm confident I can use the phone for at least a year without causing any major problems, which is good enough for me for a $200 phone (especially since I paid $125 for this Volt and it's unusable after only about 6 months).

PS- Sorry for the wall of text.