Every ensemble I’ve ever led has had some balance of satisfied:unsatisfied.
For many students, we need to work very hard to teach them to be unsatisfied. We are teaching them to be critical listeners, to be motivated to practice, to aim for excellence.
But for other students, we have to work hard to pull them back from the edge of dissatisfaction that leads to despair. They are so unsatisfied with their work that they might give up forever.
The trick, I think, is in balance. Notice the bad and the good! Be happy with where you are today, and aspire to be someplace different a week from now! Be ready for the next challenge, and remember to celebrate your current achievements.
Be unsatisfied. Be satisfied. Both.