I would sugest to take a field you enjoy. For me it is steampunk now take this field and try to give a extra twist to it. i took steampunk and put it in a sky pirate setting. this gave me and attvantage over people who post titles like "STEAMPUNK RP... YAWR". I have a littl extra backstory behind it now and still keep the originality. When you post an RP with the words Steampunk, Sci-Fi, or Fantasy it already gives you alot of info about teh rp even without knowing the twist. this wil not only allow you to get a lot of information off in very few words it will also attracked people who are into that genre.