I LOVE your idea and forethought to save a square from each project, and use them for a quilt for yourself. I think it is a great way to have a memento of your projects and it will bring them to mind when you see the fabrics in your quilt.
I have made a couple of wall hangings and a pillow. I'm starting a quilt for my daughter. Some of my items were given away. If I still have some fabrics from those projects (I'm pretty sure I do) I'm going to use your idea and start a special collection of squares. Then when I will make a quilt and it will be a memory for me of my projects.
I think your quilt is beautiful.