when I do a OBW and I've done several over the years, I always look for a novelty fabric that screams OMG, what in the world were they thinking when they made this!!!! The bigger the ''items'' in the novelty fabric, the better, about the size of a cell phone seems to work best. This ''bigger'' novelty fabric will give you a fairly long repeat, so you will need plenty but this is the type of fabric that seems to end up on the clearence rack at Joanns or Hancocks for 2-3.00 a yard!!!! No one seems to know what to do with it!!!!!!!!!! be sure to save plenty of uncut novelty fabric to use in the borders....people love to see what the orgional fabric looks like, since the OBW changes it so dramiticaly!!!!