My priority is making myself stronger over moving more weight. Therefore I go as low as possible without rounding my back, which these days is pretty damn low, definetly below parallel.
Also, based on my own experience, I believe a deep squat is easier on and healthier for the knees.
"The fastest way to get strong muscles is also the fastest way to make them bigger. We know what works best to make them strong in the shortest time possible. If you want to get big, do the thing that makes them strong." - Marc Rippetoe
Zdravko Veselin Gaeta
I am not a powerlifter nor am I a bodybuilder. I just want to be big and strong.