Couple of quick observations. If you are planning on a career that will take you some place beyond your backyard, consider that tats or any other markings can be perceived in a completely different light in different places.
Bits of metal distributed about your body will sooner or later trigger a security system at one airport or another and those bits will need to be exposed as confirmation.
Be careful what you have placed on your skin, even if it is not normally visible. Recently sitting by the hotel pool with a couple of Japanese flight crew when they tried to suppress their laughing. Female CC taking a dip had a "tramp stamp", the literal translation was "cooked brain" and something else that was too rude for them to translate for me.