I don't think I've seen this question before, so I'll ask it here since the thread is an appropriate one: Can you choose to skip getting a tattoo when creating a character, and instead give one to him later on once you have unlocked a few more? Or MUST you pick a tattoo as soon as the character is created?
You can get the tattoos and scars later, don't worry

I checked the latest customization video to see this, and I could still see the ''body tattoo'' option when he scrolled past it, so.. yeah
And I think you get all scars and tattoos from the start