With their texture, bricks will bring a rustic look everywhere. And you can combine them in so many different ways. If you don’t like the naked look, you can keep one wall exposed, and it will be the accent one. Keep the others painted in simple colors. Also, you can whitewash your exposed brick wall if you want to go for a bit softer look.
Since the exposed brick wall is interesting by itself, you should not place too much decor on it. You can place smaller frames that are not dominant. That way, you can make the walls more visible.