Have a GNex with no case and dropped it many times. So far so good which is great as I also hate cases.
I'm also a fan of no case...
IPhone 5 IMHO needs a case, 1 drop and the screen will crack. It looks hot w/o a case ... But ...
I'm wondering what most Z10 people are doing? Could the phone handle drops (like the other models)
Currently have the Bold 9930 - I dropped it so many times - from 3-4 feet on pavement, no issues. The metal around the edges really protects it.