Being a tool fanatic, I buy everything. :roll: Most of my rulers and templates are still in the packages.
I actually use the 6x24 and the 3½, 4½, 6½ & 8½ square-ups.
Oh and the Quilt in a Day Flying Geese rulers - I use those quite a bit, especially the 2x4 that makes an 8" finished Ohio Star block.