Ghetto/Black English is the most romantic and profound articulation of the English language. As explored.
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I think that someone from College Park, Compton, and South-side Chicago are basically going to be speaking three similar but completely different languages is linguistic beauty.
Brazilian Portuguese
This too, Brazilian Portuguese is best Portuguese
Louisianan and Haitian Creole are beautiful to me, as is Puerto Rican Spanglish. French can be the most beautiful language, but it depends heavily on the tone.
Swahili, Vietnamese and Greek are aesthetic as fuck. I also like Kiwi.
Although, my favorite has to be American Sign Language, especially Colloquial ASL.