The difference between those with BPD who have "created" roles that can be mistaken for alters, I have read this evening, seems to be with the alters in DID being more 3D - be able to have emotions of their own, thoughts of their own about the world, and a personal history.
But what is a personal history for an alter? As far as I am aware when my alters are not out front, they lie dormant. Unlike some systems there is no inner castle or field where they all go and "hang out" and experience things inside. They do not come out in therapy full with stories of things they have got up to inside.
I am fiercely fighting my diagnosis at the moment. Even though I have been diagnosed by a specialist. I am co-conscious for the majority of the time and when the alters come forward they do not bring with them mounds of memories for me to access. They behave independent to themselves, they think independent to themselves, but memories for all of us seem to be lacking.
Personal history - what?
Bourbon