I've seen some really awesome quilts done with a large piece of fabric as a center focus then just borders around that. Much like you did with those adorable curtains. Quilting doesn't have to be all tiny pieces and intricate quilting designs.
But it's also ok to take a break and focus on something else for awhile. It's your hobby, your time, your pleasure - enjoy whatever it is you're doing! When it quits being fun, a break is definitely in order.