Cristen, from one of my virtual quilting bees sent out a great collection of green and grey fabrics and asked for blocks with only squares and rectangles.  This was a great block to improv and I really like how it turned out - and I love how the different shades of grey and green look together.  This will be a really nice quilt judging from all of the blocks that have come in so far.  I tend to want to make my quilts bursting with colors, but I really was drawn to the simplicity of using just two colors in different shades.