Professional: When one is an expertise in all areas of a certain subjectAdvanced: Being high in level of a specific subject, not a novice
lostinidlewonder, initially I wasn't going to read all of that (too long) but once I started I couldn't stop. It's interesting to learn details about your career and how it has evolved. I felt like I could relate to the beginning part of your story, since I am just starting out with teaching and having some similar experiences and insights.
I feel like I began to develop a teaching philosophy years ago while I was "re-teaching" myself.
I also like to spend a lot of time outside of lessons making plans and thinking about what I can do to better teach each individual student. I love how they all have different styles of learning; I love the challenge it brings.
I wish I could say that I can relate to your performing career. The teacher I had in my teen years wanted to help me prepare for and organize a concert, but I did not take her seriously. I quit those lessons at 16 and haven't taken any since. Looking back, I regret quitting because she was the kind of teacher who believed in me and, being a concert pianist herself, had some connections.
A professional is someone who gets paid for their music, but as a teacher without credentials I don't feel like a professional. Even though I get paid. I don't need the money and so have closed my doors and only teach a select group of students who I love working with, and I consider my teaching as more of a personal learning experiment than a job.
I would like to consider myself a professional pianist someday and would love to be involved in chamber music and accompanying instrumentalists and choirs. I do some of that already but for free and not as often as I'd like.