I have one double closet in my sewing room and it must hold everything I need for quilting. I really don't have a large "stash" though I buy fabrics that I like and add to them as I decide what quilt pattern I want to make. I group all the fabrics for each quilt together.
I have seen some of your storage closets and you seem to do it differently; storing all your colors separate and then just draw from your stash when you know what your project it going to be. Some of your fabric stashes are like mini quilt shops! Maybe one day I will have such a stash...one can only hope. It is fun to see your quilting rooms, your fabrics and etc.
these four fabrics, black print, green, dark pink and white print is for one quilt
these pastels are for yet another quilt. On top of the pink on top are three cross stitch pictures that I want to use in the quilt, so I will have to design a quilt around the three cross stitch pictures.
here are two of my towers of fabrics. the one on the right is of fabrics I just had to have and background fabrics. The one on the right is stacked according to the quilts I want to make.