What to do on the Walls

Now that the walls in our stairway have been painted I am wondering where to go from here.  Stairways are a great place for family photos.  I especially love the clean, uniform look of black or white frames on white walls.  Here a few great examples...

Cote de Texas via Decor Pad

Decor Pad

Decor Pad

Decor Pad

Decor Pad

Martha Stewart

Nine & Sixteen

source?

Apartment Therapy

What do you think?  Do you like to see art/photography in staircases or do you prefer nothing at all?