Rule 63!
I guess people obey certain rules of the Internet without even intentionally trying! This is a very interesting and well made picture. It's strongest points are that the colors and shading are really well done. It's also great to see all the detail put into making a feminine version of the Joker. I always kind of thought of Harley Quinn as being a female Joker. This is of course a more literal example and I can understand why this character is so popular.
People love male characters, so they'd probably also love female versions too. I like how this chick has such a long body and she's a Joker adjusted to have curves. Shotguns are probably the coolest kinds of guns out there. It's great to see all the different kinds of colors used. Granted, the Joker looked like that, but it's great to see it recreated.