You could have one or ten years of experience.
You could have dozens of awards and an abundance of praise from the press.
You could nail the brief on the first take, no revisions needed.
You could have a way with clients, the ability to sell or smooth over with charm and grace.
You could approach every project strategically, with the user in mind.
You could be a jack of all trades, willing to switch between design and video and 3D and coding and illustration and writing and photography.
But the most prized designers, and the most rare, are not defined by these traits.
The most valuable designers are those who do what they said they were going to do, when they said they were going to do it.