I have three, all on my upper back. Each has profound meaning to me. I intentionally got them in places that aren't seen in my ordinary desk job. Helps prevent that pesky questioning and discrimination.
The first is my little cyclone (I lived in hurricane country and was with the Red Cross for years). The second, also small, is to balance out all that wind and water - it's an arrow, a symbol of direction and fire in my faith. The big one, in the middle of my back, is a bouquet of pansies. It is based on a needlepoint that my grandmother designed. They are our favorite flower. I got it about a year after she died. That one is spectacular - the artist, Sandra, rocks. I'll try to find a picture.