I have made 5 hexagon and one octagon OBW. I think the Hexagon is more fun as there is choice in which way the triangles go together and you decide which design you like best. In the Octagon they only have one way to be placed. I also didn't enjoy the little corners that go between the blocks. The look on the Octagon was great, but I would do the Octagon again - they are fun and always a surprise.