I could not agree more with your complaint in regard to shutter buttons that need a hard push. I got rid of a number of cameras because of this. I believe that, in hand-held situations, this foolish design induces camera shake. Anyway, I have owned just about all of the Pentax M-series cameras (with the exception of the MX). I had multiple bodies, and some, as I recall, did have that annoying hard-press-down flaw. The worst, though, were the Canon AE-1P and A-1. These are fantastic cameras, otherwise. I gave them up specifically because of the shutter release.