my sewing room is upstairs above the dining room. we have an old (circa 1738) cape, so the walls are only 4' tall then have the angled roof, complete with the antique beams & collar ties. i painted the walls a soft butter yellow, but have so many shelves etc in front of them, you can't see the paint.
the floors are the original wide pine boards, which sounds cooler than it is, they are pretty beat up. sometimes, if you drop a pin or needle, when you sweep the floor, you find it on the dining room table (usually in the winter when the wood shrinks)