via Pinterest via BHG
Classic patterns, like the diamonds above or the stripes below, are a surefire and chic way to go.
via Pinterest via Apartment Therapy
Going with neutral colors or a simple print like stripes is a great choice for something that can last a a long time in a home and potentially resell just fine!via Pinterest via Real Simple
Prints that seem to stick around are another option. There are always those few that don't seem to ever go out of style. Floral trellises are one example.
If you know you are going to be in the home you are in go with something you love! My suggestion would be to pick something you know you will still love years down the road, like a print you've always adored, since changing up wallpaper isn't as easy.
Have fun with it, because after all - it is your home!