iPhone 5/5S Apple Leather Case "clickiness of Buttons"

You are correct, and the feel of the sleep/wake button can be very hit and miss on the leather cases from Apple. On my red case, the button felt good and responded well, on my replacement black case it felt a lot mess responsive.

I've now reverted back to a naked 5s, as after all I want to show off the latest and greatest lol.

What I found is that when I first put on the case it was not clicky at all. After the leather wore in a bit it became more clicky (but still not as much as with no case), as the leather became less stiff.

Mine became not clicky at all. I really had to mash it down to get it to sleep. Then the case loosened up and deformed and went back to Apple.