If the quality of a design is measured in its ability (or not) to reduce the friction required to achieve a desired result, then user onboarding experiences are a great place to find both positive and negative examples.
While it's possible that many people who design for a living will reject this, I believe how well and simply the designed thing helps people achieve their desired ends is far more important than how good it looks.
And Sam Hulick's User Onboarding has done a better job than I ever could making that concept concrete.
