If you are feeling the urge to put some big graphics up on your wall, might I suggest stickHOME from the Harmonie Intérieure Workshop. There are several designs to choose from and you can customize the size and color of each.
The large wall stickers can be used on paint or wallpaper. See more examples of their designs and applications on their website. We like that you can create wall art that is tailored to your specific space.