At this point, I think curves are what I am not willing to try. Maybe in the future. I am willing to try just about any kind of block. I tried what I thought was a difficult pattern with on line instructions (which were excellent). It was a hexi quilt that you made half hexis and sewed them together in strips, so it ended up not being that hard. If you think something is beyond you, try a sample block out of scraps. Sometimes it is not as hard as you think!