I would say all four are useable and they all have the same theme of "Oops I messed up". My first pot started out as a perfect pot until part of the wall ran in to my fingers twisting the entire cup. The thing is though, that the design looked pretty and even intentional, so I decided to enhance the curves for my firs pot and keep that as my theme.
Since I don't have pictures of my pot quite yet, here are some photos of Alisa sanding her pot.. cuz, it's her favorite thing to do in ceramics class.