My oldest project was started in the mid 80's when I was going to make twin patchwork quilts for my sons. It was going to be squares, then at some time, not sure when, I decided to cut each square in half diagonally. Things got put away, moved from spot to spot, and house to house. At some point, I started raiding the cut pieces for applique, and still have some of the "bones" of the quilts. Obviously, at this point in their lives, neither son will be getting their quilt! I also have a Christmas star wall-hanging from the 90's that will never get finished, as when I look at it I realize that at that time, I didn't pay attention to sewing a 1/4" very well!
Over the years I have kitted many patterns and fabric, each waiting to be done. In the broadest sense of project, does merely kitting them and intending to make them count?!!