I think there's also a difference regarding publicity of the material. Using "your" is more appropriate for things that already are, or are expected to become,

I think there's also a difference regarding publicity of the material. Using "your" is more appropriate for things that already are, or are expected to become, public as a part of the standard workflow (think photo sharing application). Using "my" works better for things that are private and sensitive, like "My settings" or "My reading list" is often something that should not be shared, or only explicitly shared.