Maybe I'm an idiot, but I find where my grip hand falls on the cue has much more to do with the shot itself than anything else. I prefer a bridge between 8 and 10 inches, but I find in the course of the game that my actual bridge is anywhere from 1 to 15 inches, again, depending on the shot. My preference for bridge length seems to affect my ability to adapt to a different length more than it affects where my hands hit the cue or how I react to the way the cue balances. That being said, I prefer the balance point to be in the forearm, just anywhere between the joint and the "grip", because I know no matter how wonky the shot, I'm never going to grip the cue at the joint.