Which wallpaper should I use in a teenager's room?

Wallpaper can add a touch of luxury in a room. It can give a dull space much wanted energy, colour and even elevate the ambience. We usually apply it in our living room, dining room and sometimes in the master bedroom. With the right design, we can add opulence or fun into the design of the space. We can also add texture. With many designer papers and patterns to choose from, we are spoilt for choice. But what about when the room you want to wallpaper is your teenage son's or daughter's ?