Interesting, no? A swirly, stretchy monster. And indeed, if you're looking for any kind of swirling galaxy fractal, zooming into this Auto Quadratic is ideal, as these examples can attest:
But now, what other options are there? Julias? No, unfortunately not. But if you got to Options > Plug-in Setup you will find a "randomise" button. And when have you ever encountered a randomise button and not thought, Ooooh, I wonder what this does... And indeed, upon clicking on it, I discovered a myriad of different shapes and forms. In fact, I had a hard time forcing myself to stop clicking.