it doesn't seem to faze him that I blatantly ignore much of his advice/correction

And that should be the thing that decides it. If he was coming down heavy on you and trying to boss you into doing things his way, when you think it's wrong,maybe backing off might be inevitable. But from what you say he's backing you in teaching yourself, and that in my opinion is what real teaching is about most of the time.

A good mentor is the best kind of teacher, I think, for these kind of things anyway..