Why not add more of something when we create a new character?  Most characters have two eyes, but why not more—like 20?  Some of the eyes may be closed, some may be squinting, some may have eyelashes, some may be red and irritated!

Having more of something is exciting visually (three tails look pretty good!),

and this decision can also expand the story:  a character with two heads may, in the story, become a character who argues with himself, one head thinking one way, and the other head thinking another!

A character can have more of anything:  hair, mouths, arms, legs, toes.

Anything!