When you get tattoos in the city now, you can only get one tattoo per body part, and when you go there a second time, all your current ones gets removed, would be nice if you could make changes without having to put them all back again, I think it would be alot better if you could have several for each body part, an example being on the torso, some tattoos are only for the back, some on your chest, and some on your belly, would be nice if you could have tats on all those places.
Also some tattoos are kind of weak, so if you could add several of the same tattoo, it would make them show better, thats how it was in a city i was in before that got shut down.
Just a suggestion, I understand if it would be too much work go get sorted.