Why I'm using Zbrush in the sculpting process?

Basically, it's my personal preference. But all the necessary tools, for the expressions sculpting, can be found in Blender as well. I'm not using any fancy Zbrush brushes, I'm mostly focusing on the techniques, not the tools (All the brushes use, have corresponding ones in Blender). I think that the only function that is not supported in Blender is the layers system, but it's not a problem. You would just have to create separate blend files for every expresion.