Good job, my friend. Any questions about using the pen tool, feel free to ask. I've finally gotten the hang of it in my work, and I use that tool to create most of my designs. I like what you've done here.
I like it a lot. The simple colors and design are great. I'd suggest just adding a little detail in the middle, it could make the image all that much better.
If I were into tattoos, this would be a very cool tattoo to have... I like it, it's simple yet not simple. I like the mix of colours. I'd like to see the image a touch larger to fit my desktop & maybe some variations with different colours, in particular different coloured backgrounds.
-Rob