Tattoo Concepts

We're supposed to get into groups and form businesses in my economics class. My group is doing henna tattoos.
In my spare time, I decided to conceptualize some freehand tattoo designs. I've never tattooed before in my life, but I can damn well try...

This page is just an exercise in geometry.
Industrial Harmony was based off the "nuke" symbol, and resembles a propeller.
Angel Tear and Demon Tear are just opposing ideas, Angel being crystalline and perfect, Demon being viscuous and chaotic.
Serene, which resembles a comet, was especially liked by my group.
Core is a basic geometric design inspired by computer-type grids and branches.
Progressive is inspired by waves and such.
Opposition originally started out as beads, but then I added the binary coloring.
Banding is another radial work, simple and straight.
Crest was a basic idea, mainly for making "bands" around people's arms, wrists, or ankles. Or maybe legs, if I don't get caught lifting girl's skirts...
Possession is the real showpiece here. Inspired by a certain *ahem* someone, I just made two large spirals and filled them up with little spirals. Possessed by the spiral!