Since I could care less what men think is attractive
I say anywhere her heart desires. After all we would be the one's seeing it all the time. If you feel attractive to yourself that's what counts.
Being the only one seeing them is not strictly true as others see them also, especially if they are a partner.
All you need is someone who is not bothered about tattoos however some guys prefer the natural look.
The one thing that does crop up when someone likes tattoos is that they always say they don't care which is concerning when looking for a partner. What else will they not care about comes to mind.
This attitude can also be seen as:
Egotistic.
Narcissistic.
Depressed.
Callous.
Ignorant.
Careless.
Asocial.
Cavalier.
Apathetic.
Fake.