I am one of those simmers who doesn't own all packs. Since I do own a lot of packs though, I would like to share my thoughts on every one of them over the course of the next year. I will build a house with each of them individually, to showcase what items it has and how I personally use them. The natural thing to me, was to start with the basegame.
For someone who likes to experiment with the looks of their sims, I feel like the game does not come with enough options in the body art section. Yes, with each pack some new tats are introduced, and discover university finally has piercings (very limited options though), but these quickly get old and boring. So, just as with furniture and clothes, I refer to custom content.