I too can not do the scrappy thing, to many OCD tendencies, I sort all my scraps by color and go from there. All string blocks I make are one color. I followed the Box of Strings quilt along and made AngeliaNR's Box of Strings Quilt from last year and made all my blocks/boxes in one color strings. here is a link to the Quilt A Long, my quilt is on page 9.
I also made Edyta Sitar's Spools Spools Spools quilt using one color string blocks for the "thread" part of the spools.
My one color string blocks are just piling up and I will do something with them someday......lol
Box of Strings Quilt Along!