Hehe, when I first saw the title of this thread my first thought was, "Nothing, I quilt because it's fun and relaxing, why would I do something challenging?" LOL! But really having something challenging now and then is what makes it exciting for me too. Though right now I'm not actually working on anything too challenging. The hardest part has been the math! LOL!
I agree with the person who said housework though! Wait...I'm not working on that! Hehe