So many times, I've seen conductors that, every time they have a thought, they stop the orchestra and say it, and I can see the orchestra rolling their eyes and saying, 'Oh, God, he stopped again.' So there's a technique to rehearsing.
Good conductors know when to let an orchestra lead itself. Ninety percent of what a conductor does comes in the rehearsal - the vision, the structure, the architecture.
Good conductors know when to push and when to lay back. I've known so many great conductors that I'm still doing what I can to learn the craft of this role.
I've always been accused of moving around too much when I play concertos. Sometimes, conductors ask me which of us is leading.
Conducting is a strange thing to teach. There are very few great conducting teachers, and most great conductors don't teach. Look at Valery Gergiev - what he does is not teachable. A lot of it is on-the-job training, what works and what doesn't work.
The great secret is that an orchestra can actually play without a conductor at all. Of course, a great conductor will have a concept and will help them play together and unify them. But there are conductors that actually inhibit the players from playing with each other properly.