I am missing out here. I don't even know what a "shape cut" is and a lot of you like it most. I started out using a 12.5" x 4.5" and it still is my most used ruler, followed by my 12.5" x 12.5", and the least used is my 6" x 24", though I do use it too.
edit: googled it and now I know what I've been missing:
http://www.junetailor.com/shapecutvideo.htm I'll be adding that to my wishlist :)