I've said it before -
I picked up my 5s on launch day - having waited since 3 AM - And, rather than the 16 GB I was planning on, a 64 GB was all that was remaining for my carrier - so I bit my tongue and bought it. It looked so stellar (space gray) and was my first iPhone, so placing it in my pocket was a new experience for me - SO much lighter and smaller and nicer to carry than my collection of android phones.
Having said that, I determined that putting any type of case on this piece of art would destroy its purpose, when in the context of daily pocket carrying.
I did, however, want to try a glass screen protector - preferably a thin one that kept the same "glass" feel as naked. And that's what I did. iLoome ScreenMate Flex - It is the best screen protector out there, IMO (Although I have determined that a screen protector isn't as necessary as I thought). It is invisible, and everyone says - "Man, your iPhone looks so nice." Yeah, that's because it is naked.
Also, I do put a very slim snap-on case every day for the Gym. Then I immediately take it off and put it in my gym bag, or use it for Snowboarding, etc... when I know I could easily drop it. Other than that? No way.
Cheers.
You say no case then talk about times that you use screen protectors and cases. Naked iPhone is fine, you don't need all of that crap.