Jo-Ann

I hope the next challenge will avoid too specific a goal.  I participated in a couple, but I just wasn't interested enough to devote time to a specific form that was narrowly defined.  And at the moment, not interested in tile, though I've made quite a few over the years.
 
I tend to find the more nebulously defined challenges more thought provoking.
 
Still, my suggestion is the albarello, or medicine jar.  It's a simple form, but can take many shapes and if we're not sticklers for authenticity, many decorative approaches.

I'd like to see people choose one form ... Bowl, mug, vase, container, casserole ... And execute the form several times using different techniques ... Throwing, coiling, soft slab building, firm slab building, slump molds, hump mods, pinching, free form ... Whatever. Just test how many ways you can get to where you are going.