May I give you a piece of advice?
I have five tattoos; all are in places which can be covered relatively easily if need be. I got my first tattoo in 1989 and this was the cusp of the current tattoo/pierce trend we still seem to have going. Being that having tats was unusual, I chose my ankles, shoulder blade and hip, figuring that none of these would prevent me from working.
Also consider that color will fade, lines will lose their sharpness. Fresh ink can look fantastic, but go for stuff which will age well; detail doesn't.
Remember too, that the pain of tattoos is different depending on which part of the body is done. My ankles weren't horrible, the hip had a lot of referential twinges in my shoulders, interestingly enough. The shoulder blade hurt the most. I would imagine the more sensitive the skin, the more it will hurt. I would never have my feet done, ha.
Find someone with a good reputation who is licensed and bring a drawing or reference sketch. This will clarify what you want as a customer and help a lot. Some places want time to sketch something out, some tattoo artists go mostly by appointment. Figure out where you want to go, do your research, and make wise choices in design so you don't end up with something that fades ten years later. Have fun!