>>96157089
What kind of "job" character has/had before starting; e.g. how did they managed to live/eat?
One or two general traits from which to expand on. Generally linked to how discussions will go in-character (character is smart but not charismatic, etc.).
Sometimes a strong like or dislike, usually setting-related.
At least one hook for the DM to pull my character around, like a motivation or some NPC.

Honestly I do end up writing more notes and sometimes portion of stories but lately we've been running premades so while the DM does some customization it isn't too deep.