We often get in a rut when it comes to photographic composition. It's good to experiment with different techniques and styles. One thing to try is putting your subject off-center. Instead of lining your subject up with the box in the middle of your view finder, put it off to one side. (There's a composition rule called "the rule of thirds" that makes this same point.)
Having your subject in the center of your frame is by no means bad. However, in some circumstances, your image can be much more interesting and compelling if the subject is not centered. Consider these images.