Old doors can be used in different ways to decorate your home. Below are some inspirations. The first set of image is definetely the most inspiring to us. Dedicating an entire wall to display a set of doors (framed or not) is a daunting task but one that will yield amazing results as seen below.
Inspiration: I can already see the doors painted in specific colors to match a space, and maybe have some of these doors open to reveal another element of decor, such as a painting or the wall painted a different color; or have an entire story hidden behind the doors. It would certainly make a great conversation piece when you have guest over.