I wallpapered my office when I walled a part of the lower family room. The wallpaper has a collection of old iconic drawings, ads, etc., from old magazines. It creates a "throw-back" feel to the space, and that's fine with me as I work on our finances and where I do my writing.
My other room for working and writing is our downstairs den are which we call "The War Room." It is a large room with a gas fireplace, an HDTV, a small fridge, and a coffee table with a lift-up top that I used as a "desk" for grading research papers and tests, writing lesson plans, etc. One day, Mrs Media asked my oldest son, "Where's your dad?" He replied, "I think he's down in the War Room doing his work." That's how the room got its name, and the name stuck. The War Room remains a place where I will watch TV while writing letters with my laptop, etc.
It has cream-colored paint on the walls, which is fine for me because it doesn't distract me from the work I do.