I can't nail it down to one favorite soap as I have quite a few, SC was one of my first soaps when I ventured into wet shaving and it's still one of my favoritesSoap Commander is my favorite soap.
I lather right in the nice big container it comes in, with a slightly dryer brush, to work up the top layer of soap. I then pass my brush through the tap stream and go back to the tub to build yogurt.
Fun times.