All the SMs I work with put blocking on the left and Qs on the right, with the text on the right hand page. The interesting thing is our TD teaches a basic production class that has a Prompt Script project-and he teaches them blocking on the left & Qs on the right, in a narrow margin near the text. He's also a lighting designer, so he needs extra space for description of Q's but only basic blocking diagrams. Any of my friends who have taken that class see my book and wonder why its 'backwards'.