re: Golf people, Let's talk driver shafts

The degree of loft affects the backspin the most. Shaft helps control the spin. It's kind of complicating, but usually the more vertical you're onto the ball, the lower the loft you're going to need. If you're flatter in the downswing, a higher loft may give you better performance. It's hard to make a general statement on what a 9.5 or 10.5 would do, without seeing your vertical angle onto the ball.