I'm looking for an iPhone 6s case that is thin, and offers full back coverage; but, from the front, it should only grip the corners. Edge swiping is part of my usage with the iPhone, and when there's a case on there, it makes it harder to do those. Plus, on the 6s, you can use 3D Touch to invoke the task switcher, but only from the edge.
With my mega great Paint skills, I mocked up a thing to show what I mean:
With my mega great Paint skills, I mocked up a thing to show what I mean: