I do not have a title (unless The Pageist counts, which I’d be pleased with). None of the titles I’ve heard other people called or used have resonated with me.
In regard to other people and titles: knock yourself out. If someone has a title that feels right to them and everyone in their kink family is on-board then go nuts. Just don’t expect people outside of your family to call you Lord DragonCock or whatever.
[graphic from here]