I think the titles are misleading. Low functioning does not mean you are incapable and high functioning does not mean having more control.

Personally, I would prefer the low functioning title although with my narcissistic traits I would guess most professionals would probably drop me straight into high functioning.

Both have their cons. Please don't get caught up in thinking one is lesser than the other because those 3 categories don't cover all the things a person with BPD can be.