Our last house in Calif had slanted walls on three sides in the sewing room upstairs -- it was a huge room (nearly 400 sq feet), but the slanted walls were a challenge. The previous owner built in bookshelves and one set of dresser drawers into one wall. The second was slanted down 2/3 and then straight, and DH built me a raised cutting board area, which left tons of room for a really heavy and very long table that I put there, to sew on. Put fabric on the table edge to cover up, and used the area under for storage. It was pretty and functional. The third wall was by the window, and both high ends were next to the centered window, and dropped down to the corners. DH and I built in cabinets on each side for fabric storage & put a window seat in the center that had a lift out to put storage into the seat. I loved that room....it was charming, functional, full of light and all mine!