As a follow-up question, do your players, when they use pregenerated characters, prefer details about race & culture in the notes or would they prefer such notes in more detailed examinations of the relevant races/cultures.
For example, say there is a choice of a Mablung healer: would they prefer details of what it is like to be one, etcetera, as part of the general write up of Mablung healers as part of, or separate from, the character write-up?