Cheers for the above thoughts.
I'm a big fan of going naked too*, but hearing the OP3 can be a bit slippery in the hand so figured a case would add some grip when out and about. I'll pick up a cheap clear case so generally use, and maybe a rugged Spigen for jaunts to the beach, etc.
Not a fan of screen protectors either (they never fit properly for me), so happy with leaving it alone as long as it doesn't scratch easily.
*and the phone.
lol sorry I didn't even link my case - dope!
here it is
https://www.amazon.co.uk/gp/product/B01H3PEWDK/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1