I know what I'm missing. I know what I have to work on. Coloratura. And I sing sharp sometimes. It happens when I'm nervous.
When I started, my teachers told me that I had to sing 'Mozart, Mozart, Mozart.' I said, 'No, I want to sing all the other stuff.' If you do not push yourself, you will stay the same. Maybe some singers are happy with that, but I have to move, I have to do something new always.
If you ask me about vocal technique, I don't know anything. I could never be a teacher. I just know what my teacher told me: 'Always sing with a full voice. When they tell you, less sound, more piano - no.'