Tobey, don't apologize, make it part of your persona like you're using the Royal We and mean to. I have all sorts of words and phrases I use that my friends and family are use to and enjoy because they're "Me".

You don't have to "tell" people you have DID but you can imply/"act" like you do and like you find it natural and part of you. I deliberately use the word "need" instead of "want" all the time, even when it looks "odd" to people who don't know me. And I give them a challenging look like they are the one's who are out-of-step instead of me when they say something :-)

"Stand up" for yourself and your quirks and habits; no one else can/will.