This recent post on Piano Mistakes NOT to Correct by Dan Starr is fabulous! I love how he breaks down the different types of mistakes to highlight just how particular one can become in their performance expectations. Then he lists the order of his “Priority of Mistakes”:
1. Learning music you dislike.
2. Playing with an uneven tempo.
3. Hitting wrong notes.
4. Using wrong fingering (playing with bad technique).
>>Read the whole article for lots of great additional thoughts about each list item. If you have adult students, this is definitely a site worth directing them to!