I always wash for many of the reasons stated here. Dog hair; starch; hand oils. I also hand quilt so I want to wash out the marking lines and just general dust and dirt that accumulate in the time it takes me to quilt it along with it dragging on the floor in that process. Plus, I too, like the crinkled look. Even though I prewash my fabric, I have found previously a fabric continued to bleed after I washed that darn quilt about 10 times. Finally gifted it with a box of color catchers and told the recipients to ALWAYS wash that quilt with those!