I love the rhombus! It's not like the other shapes, but it still fits in with everything else. I've always wondered what kind of designs you could make with it that you couldn't with the normal shapes. It would take a true wizard to decipher the inner workings of this design!
I love pentagram 's and circles but I'm a little witchy lol so maybe that's why mes love them .
And flower shapes.. I used to like drawing with those funny keliodicope flowers things