First off I'd like to say thank you Rare, for allowing us to finally customize our tattoos. This was one of the biggest highlights of this DLC for me. There's a small suggestion I have on how to make this new system perfect. It could also work for the custom scars. Simply divide the packs up into pieces such as: Left arm, right arm, neck, head, chest, back, left leg, right leg. This would give us true customization because as much as I love some of these sets, you can't really stand out. Granted, there's only 4 new sets at the moment. I think it'd be much cooler if we could mix and match tattoos and scars.
EDIT: I think we should still purchase them as packs, but be allowed to place them on as we wish.