I have Conqueror, of the Alliance/Horde, the Bloodthirsty and Battlemaster. If I ever get my Herald of the Titans character finished Justicar is within reach for me (Former 39 twink needs AV rep and to finish off AB.)
Khan is something I will likely not ever get and I don't even like the title that much. If you think I'm going to farm Isle of Conquest for achievements .
Honestly though besides Conqueror if the PVP titles were not account wide I wouldn't have any of them.