I use center ball (high, low or center) only about 25% of the time. I know, it should be more, but other than when I use the shaft method of aiming or the natural path of follow or draw is going to get me where I need to be, or I want to stun with an angle on the shot and come straight across, then that is when I use center.
Even if there is a slight angle on the ball, many times I will use english to make it a stop shot, and vice-versa.
Many times, I need to narrow or widen out the path, not just for position, but to avoid a scratch or for caroms, and that is where english comes in. I almost always give a little skootch of outside to everything. Even on natural banks, do I rarely not use english and adjust with the speed.
Also, for whomever talked about only 1 tangent line, yes, there is one natural tangent line FOR CENTER CENTER BALL, but it is affected by draw, follow, force of hit, and side spin, because you are hitting it at a different point on the ball and letting the english throw it toward the pocket (or compensating for throw).
Also, remember when pocketing balls, that the contact point, even using center ball, can vary a lot, depending upon how close it is to the pocket, so that will affect which way the tangent line goes as well. In other words, if you have an object ball near the side pocket and you aim to hit the inside of the pocket at its extreme left, then again for the extreme right of the pocket, you could have a contact AREA that is actually about 3" (which is why a lot of beginners take 'hangers' for granted and hit it any old where with any old speed and do not maintain position control) to a shot close to a rail with a lot of green where there is very little margin of error.
Even if I do hit that hanger at precisely the same contact point every time, my tangent line would be affected if I hit it with hard draw or soft follow or anything in-between. Hope everyone can understand what I just said, lol.
So back to the original question, I do use center ball but agree with Colin that the more weapons in your arsenal, the greater success you will have when you need them. :wink: