I am so glad that you didn't write ABCDEFGHIJ... Which I have seen a lot.
The balance of this piece is really quite spectacular. The open spaces and the closed spaces. I love the textures created in the background.
More skulls? Are you insane? But, the effect would probably be better.
The pen and ink version you have proposed doing of this will probably come out very well. And will probably be really easy to make prints of.
Yeah, I love working with bones. I think they are beautiful. Seriously, people use our alphabet? You know how some people can sing and kind of search for the right pitch and that makes the singing even better? I think I do that with positive and negative spaces, I go with what looks good to me. Thanks @builderofcastlres. I love your critiques...