I have seen some beautiful OBWs. My suggestion is that you choose a busy, or even wild print. Two of the most memorable OBW quilts I have seen were a bright orange, yellow and gold koi fish pattern on blue water background, and the other was a collection of teacups each with a different design on it. I have one half finished with bright jungle parrots on it...lots of colors and interesting feathers and leaves. Now for the least successful (IMHO) ones I've seen: fabrics with a lot of plain background between the elements. Plain background in large areas provides no design. The other unsuccessful one I saw was an all-over print of yellow daffodils with green leaves. Because the fabric was an all-over print, once the blocks were cut and assembled, it still looked almost the same as the original fabric. Go BOLD; even ugly works well because of the kaleidoscope effect. The right fabric is key to the success of a OBW.