This is not a technical question. However as the FAQs say this place is about
people who love to create well-structured and beautifully typeset documents
I take my shot.
I am often confused when which font family is more appropriate. Most people would suggest: "take what you like the most". But there are typographicaly reasons and I don't want to pick a font familty randomly.
I am looking for some good paper reasoning about the choice of font family, no luck so far. Are there good sources?