It frustrates me immensely and hacks away at my self-confidence when I think I have been careful and accurate all along the way and end up with a block that's not just right. However, I have sewed together blocks with uneven edges, blocks that don't quite match and blocks of slightly different sizes. I have finished quilts that don't fold up exactly square. All those quilts are used and loved so I guess my need for perfection can be safely stepped on at times. I would love to be perfect. I would love to fuss about thread width. I recognize when things are "off" but can't seem to find the finesse. Squaring up is my quilt-saver.