I used to hate tattoos as I would always think "What will she look like in 20 years!" Of course I then realised I wouldn't see her in 20 years and so started to appreciate how they looked now.
If tattoos look good on anyone, it's hard-bodied girls in their early 20s. My favourite local girl (now sadly retired) was a 5'0" gym bunny whom you could bounce a pound coin off - she was the one who converted me to how fantastic a well done tramp stamp could look. Tattoos on breasts (or other intimate parts) are a total no-no, as is anything too big. It's also quite important to me to know about tattoos so I can make an informed choice. I understand why a WG may well want her tattoos airbrushed out to protect her identity, but she should mention she has them in her profile. I always ask, just in case.
As for piercings, I like pierced ears, and I LOVE pierced tummy buttons, especially with dangly studs. Pierced intimate areas are a turn-off. The body studs that have just come in look stupid IMO. Pierced lips get in the way of kissing in my experience, and so are not to be encouraged! Pierced tongues are nice for the added texture with oral.