This is a very minor suggestion, but it would be nice if you could control how the banner is displayed on your profile page.
Mostly an option to change if you want the banner to copy itself to cover the width of the page, or to leave the rest of the area transparent outside of the actual banner itself.

For now this had been changed to cover the space so it does not repeat. Later if people still want it I can look into making the behavior customizable. Perhaps even custom profile CSS?