I picked up on core spinning very quickly and now it's one of my favorite techniques. You can core spin fluffy or smooth, it just depends on the look you want. I especially like to spin silk waste. I buy silk waste directly from india...it is the fiber waste when they make sari's. It is super soft and so light weight. Here is the video I made and some pictures of fluffy core and smooth core spun yarns. Give it a try!