We've got one big wall in this joint.  I've had a lot of ideas come and go while trying to figure out what to do with it... it could house a big hodgepodge of art and old family photos, a giant macrame, maybe dramatic wallpaper? But in an attempt to overtake the house with plants (I'm shooting for 100) I settled on a living plant wall.  The plan is to put a skylight in over the stairwell in the next year, which will help train the plants up and keep them nice an healthy.  I used the Wooly Pocket system in a skewed 3/3/2 pattern about three quarters of the way up the wall, with the lowest container just above head height. The containers have a well at the back that sustains the plants for 2 weeks before needing a refill.  Here's a little picture tutorial of how I put it together...