Flavor for your walls

I am desperately seeking home decor inspiration. My bed and master bedroom furniture are all figured out {in my head} so, I am on to the second most important room in the house and if there's one room that I have carte blanche on...it's my office. I can make it as feminine as I want - including but not limited to hues of pink, fashion magazines, antique lamps, images of Audrey Hepburn and more. My current obsession: wallpaper. I am between these three. I have fallen into a torrid love affair with this website.

What do you dearies think? To wallpaper or not to wallpaper? Is paint easier?