I always thought about how it would be like to see heaven and hell together, seeing two opposite sides at the same time, comparing the differences between the two. I then did this design using a skull that symbolizes death (because that's the only time when you can see your destiny when your physically dead) I then divide the skull into two parts, hell and heaven. On the hell side I add some details like the the gold teeth, which symbolizes riches in the world, the eyes and the horn sticking out symbolizes the devil. On the heaven side it shows a normal skull with the eyes colored blue, the eyes, as some say, are the windows to the soul. The blue eyes shows brightness and purity. The halo above symbolizes a holy person. This is what my design shows. (I intentionally made the wings face down to look like human ribs from a far)

I love the symbolism and dual-nature. And interestingly, the skull is placed between the wings as if it was a heart...I have to admit the design grows on you.