We have a stone fireplace with a pine mantel. The mantel is crooked. We got it this way and don't know how to change it, so we adjust things accordingly.
From a distance, you can see the color scheme of the room. Mostly brown, with red, blue and gold accents. Our golden pine floors, 120 years old, are beautiful, and make a big design statement. They will not be ignored, and blue and gold become important color counterpoints in the room.
I have a bit of this and that...all fall colors, pictures leaning, candlestands, pumpkins, a fall wreath, and a globe...just sort of shoved up there.