An idea from my beginner AS days.
I like these simple designs because they easily speak more about the wearer than the literal meaning of the designs themselves. The way I prefer to experience with interesting T-shirt designs sometimes is to have a level of subtlety and thinking involved that start off as a quick glance and notice of what the person’s shirt says on the surface, and as they keep seeing it, the meaning about the shirt and the wearer layers one after another.