When I left Facebook I downloaded and reviewed all of the information in their profile of me. It was extensive! Age, profession, race, religion, political leanings, and more. I know that this profile omitted the data they are legally required to pretend they do not collate: such as purchases, SSN, party registration, photos, face metrics, and location trends.
But they pinky promise they are not doing that so ... it's fine, right?
And they said they deleted it all when I asked! Phew! I'm safe.