So far, this has happened to me only once. I donated the unfinished quilt top and fabrics to someone.
It turned out that the quilt had too many fabrics and colors in it for me. My color blindness just didn't let me put it together in a pleasing (to me) manner. The good Lord only knows how many times I tried to make it work...
I learned my lesson and now my quilts use no more than 5 fabrics.ys