Yesterday, I received a pebbled leather case from Amazon. This one is from Mobee but there are a few others on there that appear identical; the Mobee one had the fastest delivery so that's what I chose. The listing says that it's "top grain leather," and it does smell faintly of leather. The pebbled surface is comfortable to grip - much nicer than the Apple silicone case I've been using, which seems to slide around in my hand ever so slightly, as if it were coated in powder - and it's easy to extract it from a pocket quickly.
The camera control cutout is fine - not ideal, as it's not tapered so the button is a bit recessed, but I'm still able to half- and full press without any significant difficulty. And it's actually a good place to anchor the tip of my ring or middle finger while holding the phone one-handed; accidental presses of the camera control are quite unlikely. The metal buttons are nice an clicky, and while perhaps not as smooth around the edges as the buttons on my old Apple leather case, they're by no means sharp, and I like that both they and the camera surround are also blue.
I have a couple of other leather ones coming tomorrow, but for $25 this is probably a keeper even if I end up keeping one of the other ones as well.