Maybe this is just a reality check, but I don't think I bought THAT many shirts. If you click on "shirt quilt" under labels, you will see that I have already made quite a few quilts from shirts already.
I have so many crumbs of my shirts. I keep them all corralled, so they are easy to access and keep track of anyway.
Top picture is a string of 2-piecers waiting to be ironed.
My friend, N, of Scraps-A-Plenty made a crumb quilt lately. Hers isn't made of shirts, but mine will be. Look here to see hers. I like the zigzag setting, so that's what I am going to try. I don't have many light shirts, so I just cut up some whole pieces of light shirts. I will eventually have scraps of those as well. I need some bright colors. These are really dark and boring.