Stance
Let me first say that Scott Lee thinks he and I differ more on stance than we really do. Although my approach may sound more rigid, I do make some minor backend adjustments, but prefer to do it in person so I can see who I am dealing with.
And more weight is on the back leg because it is supposed to be locked and the front leg is slightly bent. You can support your weight longer with your skeletal frame than you can with your leg muscles, therefore reducing fatigue over long periods of time.
Granted, what I learned was from the best Pool books during the early 60's.
It stated a 60-40 rule, but about 2-5% of pressure normally on your bridge hand. 10%, I believe, is too much, for example, I weigh 160 lbs, and 10% would be 16 pounds of pressure, and would cause me to be overly front loaded, and not able to sight properly, and would have to be higher on my cue, looking down over it, with too much emphasis on the front end, which would throw certain shots off. 16 lbs of pressure is a lot, considering most of the time you just rest your bridge hand on the cloth.
Now, this is just my own personal analogy, so take it for what is worth, but
about the easiest transition for going into a Pool stance, I think, is from a standing Rifle position, and taking your rifle (cue) down into a Pool stance over a table of some kind. Bend at the waist, keep your back straight, and be at a 45 degree angle to your cue, so that you maintain straight lines with body, and your chin falls right over your cue.
A snooker stance is not at a 45 degree angle, but beside your cue, and you have to bend your upper body shoulders and neck to get your chin and eyes over the cue. This will play hell with your body over time, since you are not maintaining straight lines with your skeleton, and contort muscles, which results in body pain, or worse. One of the reasons Allison has such pain in her shoulders and neck.
Take my example of a standing rifle position, would you fire a rifle standing with both legs even? No, you wouldn't, and really a Snooker stance is reducing a tri-pod stance down to 2 actual points. You ask what is the big deal, but consider this. If you had an ear infection that throws balance off, could you maintain yourself better with a 2 pod stance or a tri-pod stance? Well, I know, and the answer is a tri-pod stance although not easy in that condition.
In a standing rifle postion, more weight is on the back leg than the front, and Pool is not a throwing sport, but a stroking one, but the principal is the same, although the difference between the back and front legs is narrowed some.
Depending on the shot and the cue ball being up close on the rail, I have noticed I occasionally end up in a Larry Craig stance with feet wide apart trying to get low on the table. I have even occasionally bumped feet withthe player standing behind me. OMG!