We are big fans of leaning posters and framed art against the wall, it is a low commitment way to add a variety of prints to your space and so easy to change! These graphic prints look great with the mesh backdrop and some textiles to soften.
This picture frame collage is neat. I love the font on the wall and I adore the famed initial in the middle. This would take up a good chunk of our huge living room wall so my wall won't look so naked.