Phoenix calls me his Lady, and he is my knight. That is currently my only title, though I have been called many things in the past: kitten, princess, little one, Miss, and Ma’am. Of all the titles I’ve resisted the most, Mistress just strikes a raw nerve with me. I can’t disassociate it from the vanilla use of the word.
As far as my current title goes, I am his Lady and he my knight, because while he is sexually submissive and generally acquiescent outside of the bedroom, he is not submissive in all things. I view him more as an equal, following medieval standards of chivalry. Our relationship is patterned after the romantic legends where a knight would swear fealty to and serve someone for life (in our case, his Lady). For some knights, this could include sexuality. The important factor, however, was the strength, protection, loyalty, and chivalry.
I used to place a lot of stock in titles; however, I am learning that a dynamic that works for the people involved is far more important than the title attached to it.