Its an everyday thing for me too. I have parts that work parts that interact with family parts that interact in certain situations etc. i am more aware and coconscious than I used to be but i still have a lot of gaps in my day-to-day life. I really don't have control over it at all. It just happens. A lot of the time i don't even know it is happening. When I have recorded my therapy sessions I can hear how often I switch in therapy without even knowing about it.