yes it is good to have set of tunes that no one has really heard, but at the end of the day a lot of them are going to get found out sooner or later and we have to move on and try and stay one step ahead. Also like voorheez said, ppl would concentrate on your technical ability more if the tunes are familiur, this is a good thing (if your a good dj).
But i know what hakka means aswell, but i think you just have to keep searching for your tunes, get the ones you like, and play em.