When your clients, customers come to you, it is important that they feel the drive you put into your job - to meet their needs and solve their problems. Those who are successful and strive to be at the forefront do so with drive.
Wall decoration can be a great help. It doesn't indoctrinate with unnecessary information, it's not direct marketing - it will be one of the cornerstones for setting the mood in your store or office. Another important advantage is that it doesn't take space away from the tools and furniture that are essential for your work.