I make nothing but scrappy quilts so just use what I have - when I moved into my new sewing room I did sort it by color. I was amazed by the amount I had "stashed" here and there. I do have to buy fabric for sashing occasionally.
My S.O. (who designed my sewing room) says I am not a "Hoarder" unless you can't see the floor. I am not there yet! LOL