I use triangles as leaders and enders so I end up with HST units. I usually pair a light with a dark or medium. I do triangles because it is easy to get a triangle out of an odd shaped scrap and before I got the Deb Tucker wing trimmer tool I made FG from a rectangle and two squares so I had lots of triangles from the cut offs. I have ziploc bags of HST that are 1 1/2", 1 3/4" and 2". Pretty sure I have enough of the smaller size to make a scrappy tree of life quilt.