Unless we have had fomal instruction, I suspect we all employ a shooting form which developed naturally and was influenced only by comments in "pool hall school". I always heard a lot of discussion about "stroke" but never "grip". "Follow through" also garnered a great deal of instruction. At some point, many years ago, I got my hands on a book about pool which contained a discussion about gripping the cue with two, or three, fingers (the "V" grip?) which I attempted but gave up on because it never felt right and absorbed too much of my conscious thought. Ultimately, to shoot my best, I need to be in the "zone" and anything that intrudes or disrupts is counterproductive.