There are several ways to add an interesting touch to the stairs. If you're looking for decorative ideas, consider filling the wall next to the stairs with artwork and family portraits. You can even install a long, cascading pendant light that gives a glam look to the stairs.
That apart, for more structural changes, consider a spiraling design, sleek railings, or even floating treads. You can also paint the steps or add a staircase carpet to enhance its look.