When labeling is an art, you want it to be precise, not peculiar. Take a gander at Roman numerals if you're feeling fancy. Or maybe decimals are more your style.
Here are a few more examples of numbered labels:
Why settle for boring old alphabetical order when you can have the thrill of the alphabet's first five letters?
Make your labels shine with the elegance of Roman numerals.
Be the envy of all your friends with decimal labels that never end.
Why settle for boring old numbers when you can have the whimsy of lettered labels?
Make your labels pop like the hieroglyphs of ancient Egypt.