I knew I loved Thrawn from the sequence where he wants a ship tracked and when it doesn't work, the supervisor of the monitoring section blames a junior officer. Thrawn asks the officer to explain himself, and the terrified kid outlines a new tracking technique he was working on, which should have worked better than the old one.
Thrawn just waits to him to finish and then... congratulates him for coming up with an innovative approach which deserves further examination, because he's right, it SHOULD work better than the current method. He then tears a strip off the supervisor for not standing up for his men.
Now THERE'S a Grand Admiral I'd go the extra mile for! (and you just know that every single junior officer on the Star Destroyer would hear about that little incident within a shift rotation)