I went through a very difficult initial period with my piano teacher who is focused on correcting my myriad of bad habits adopted (and almost cultivated to perfection as a self-taught adult.)
Yet, after 10 lessons, I asked for her again and I am now appreciating her goal for me: To teach me to be a professional and to approach music as a professional.
It certainly isn't the pedal to floor, bang out style I had developed, but I think now I am playing music...and not just emoting with the keyboard as my instrument.