On the few occasions where people find it necessary to adress me (which is seriously very rarely, else i wouldnt mention it), ive learnt the most efficient solution is to just tell them to call me 'afro' (my large, conspicuous hairstyle).
i used to say 'call me whatever you like' but they always asked why, and explaining to people how names and titles are for their convenience and i could care less what you call me, as long as you can remember it and identify me by it is a bit to complicated an answer. so, i just gave myself an obvious, simply nickname, and have people call me that.