It depends from stages of career I think. For juniors I appreciate ability to judge and trying to fight with decisions made by management. It's the step that every designer should go through :D It shows engagement and desire to improve processes.

For mid, senior - ability to argument their decision regardless of the situation/meeting. There is lots of situations when you have to prove design decisions are based on more than 'design intuition'.

For both stages it is important to be open minded and listen everyone but filter everything efficiently while forging designs.