this isnt my idea its from a tutorial on how to make your characters more noticeable and holy shit it works

The fundamental shapes are triangle square and circle so if you build your characters shapes out of personality (sharp and witty could be square/triangle, but if they had a soft side you might round out the sides of the shapes a bit more) and then they dont look like crackers

Nature goes by this too and its so epic! Foxes who are sneaky are trianglier, dogs who are loyal no matter their owner are squarier, and cats who are lazy are circlier