There have been several comments on this thread regarding people who are "anti aiming". And I think there are some who might have misunderstood the intent of my original post. Let me just state once more for the record that I believe everyone needs to learn proper fundamentals in order to become proficient at pool. That includes learning to aim using some sort of "system". In fact, I believe that it is beneficial to learn many different ways of aiming. It never hurts to have a few different ways of checking your aim. That's just more tools you will have in your arsenal. But, that having been said, my personal experience has been that I don't often find myself consciously using any "system" to aim. I might use one on combinations or on a very difficult game winning shot. Not very often, but in some instances. But on probably 95% of the shots I take, I don't. What I find is that when I play often enough, I begin to "see" where I need to hit the OB pretty decently and do not feel a need for utilizing any aiming "system". I do aim, just not with a "system". Now, of course, I am talking about cut shots here and not banks or kicks. I routinely use various "systems" to check my aim on these types of shots (although I believe you develop a feel for these shots as well).
The real intent of my post was that I believe once a trained pool player has played enough games, he/she begins to develop a sense of "feel" with regard to aiming. And, I also believe that when one of these trained players is having trouble with their aim, it is very often not where they are looking that is the problem, but rather some other flaw in their fundamentals- misalignment of the cue/body, faulty stroke, lack of concentration, and so on.
I don't think that just mindlessly pocketing balls will automatically make someone a pro, and I have never said that. Believe me, I have seen far too many self taught players in my time. All the practice in the world will not do you any good if you practice bad technique.
Thanks to everyone for their input. There has been quite a bit of very informative discussion here.