Bernhard:
Yes, on reflection one tends to forget how one felt at sixteen. A certain amount of this sort of association is probably a good thing for a young person, or even to foster enthusiasm in an older beginner. My big names used to be Chopin, Liszt, Gershwin and Waller; I almost worshipped these four, and the detail of their lives and personalities all became somehow mixed up with their music and my playing. As you say, not necessarily a mistake at all, provided the pupil doesn't actually begin to drink like Waller or imitate Liszt's amorous propensities !
When I say I disregard theory and form I do not mean that I have not tried very hard to understand, of course. I took a course of study under one of this country's foremost musicians (many years after the death of my original master - cost me an arm and a leg) for this very reason. He is immensely accomplished, an incredible sight reader with a huge repertoire and an encyclopaedic knowledge of music and musicology.
He told me the harmonies I was using were "wrong", and I dutifully worried for a few months about this. At length I came to the conclusion that if I really preferred wrong chords to right ones there was little to be done or said regardless of where the fault, if any, resided. He liked listening to my improvisation and requested copies of my compositions so perhaps I wasn't quite so completely "wrong" in his eyes after all.
So when I say I reject theory and form, it sounds a little more cavalier than it actually is. I mean that I can, or could if I took the time, understand it on a purely intellectual level. There is just no way I have ever been able to make the association between it and my intuitive sound responses during the creative process. It has always seemed rather like using the English language to describe the taste of a strawberry to somebody.