I am interested in sources (reference author, work, paragraph/fragment) describing the view ancient Greeks held about people of African descent.
By that I mean those whom they called Αιθίοπες (Aithíopes), not the Egyptians or other North-Africans.
Are there attestations of racism (strictly because of skin color) or admiration in ancient Greek works?
Regarding admiration we have one account from Herodotos (3.20) who states the following:
These Ethiopians, to whom Cambyses sent them, are said to be the tallest and most handsome of all men. Their way of choosing kings is different from that of all others, as (it is said) are all their laws; they consider that man worthy to be their king whom they judge to be tallest and to have strength proportional to his stature.