Make it your "style". Prefer a shabby chic look, surrounded by things that inspire you? Do it! Prefer a more industrial look? Make it yours! Prefer something more traditional? Who says you can't have it!
Just a few added suggestions. If you aren't fortunate enough to have a beautiful window view, make sure what you see every time
you look up is something that makes you smile, inspires you, or motivates. Beautiful artwork, photos of loves ones, your favorite cartoon - you choose.
Piant it a color that works for you and your work. If you are high energy and need to slow down a bit when you're in your office, a soothing blue/gray might be the color for you. Need more energy when you're in your office so you don't go for that afternoon nap? What about a hot pink? Don't worry about what anyone else thinks. This is your space, your working environment, and it should reflect you. And make going to work every day a whole lot more fun.