What a unique quilt and a keepsake of sorts. As to quilting, if you stitch 1/4 inch in from the edge of the segments, that will be really close quilting. I would look for a swirly type design, flower petal type or something along that line. A feather wreath would be nice too, maybe even a double wreath, one on the outside, and another on the inside to keep the scale to the size of the segments. Background, I agree with crosshatching. I saw a Dresden plate quilt lately with a y0-yo for the center an it had been stuffed to make it stand out. REally unique, but you would lose the pink of the center. Hopefully out of all these suggestions, some are ones you can use.