What about temporary tatoos? You could then try out the location and type and see how you feel about it.
I have sometimes considered getting a small, non=discript tatoo in a location that noone but me and close friends would see (or maybe beachgoers, if I ever went to the beach, somewhat as an hommage to my deceased father, who had tattoos up and down both arms (from a time when he worked as an assistant elephant trainer in a circus, back in depression days, and the circus'tatooed man, who was also a tatoo artist, gave them to him), but I can't see having something that permanent on me.
A temporary tatoo of a vine or something right above the bicep muscle also sounds cool to me.