What climate do you live in? I live in the north (Canada) and during the winter my skin gets very dry. The glass and metal of recent iPhones feels extremely slippery to my dry skin. I use a rubberized case which makes the phone much more grippable, at the cost of even more bulk. I really want a small, lightweight, grippable iPhone.
This was in the UK so not very humid. Interesting that everyone's experience is so different. I just dried my hand and holding it flat with my XS placed on top, I can tilt it to about 15-20 degrees off vertical before it starts slipping off!
