Well, I guess this is very simple but maybe worth a try, I guess I have to explain it, though...
My personal vision of the goddess is complex, but can be very simply represented.
This is a tattoo designed by me. It's on my inner right arm, placed so that I can always see it.

I wear my goddess on my skin to remind me that she and I are one, my goddess is always with me.
What I was thinking when I designed it: I love quantum physics and my tattoo represents eternity on that level, eternity is my goddess. The phases of the moon stand for the phases of life and are placed in the intertwined never ending lines symbol for infinity. The repeated 3 dots around are to show atoms that are at the same time the infinite joining-together represented by a trinity. Am I making any sense at all?
I've had this tattoo for a long time and it's very much a part of me, even though I've since gotten many more complex ones it's still my favourite and if I'm feeling nervous looking down at my arm and seeing it is comforting. It's simple, but beautiful (I think). I hope you like it.