Your example blocks are showing some fun prints! It's nice to see what other people have in their stash!
Whew! I'm glad it's not required to spin seams because I don't usually do that. I'll send you a pm-- I'd like to join this swap. I'm sure the international sewers understand that they should send USD for return postage. I hope we get some in this swap, as their fabric prints might be different than USA ones!
There are so many uses for a 6" (finished) block, for example the center of a star, and so many patterns look great with 9-patches! Won't it be exciting to see how each of us uses our blocks? :-)