How about a MMO chocobo racing game a la FF7?
My god I spent days making the perfect chocobo, between breeding several different wonderful status ones with ridiculous speed and stamina (always capped at 999, but yeah), followed by the lame hours of breeding each one to get the gold finale, I hated it so fucking much. Course, when all was done, I managed to win races by just draining my stamina and walking to the finish line. Teioh couldn't hold a candle to me.
I would never touch a DQ MMO, it would be a horrible endeavor, doomed to fail and ruin a generally well made series of games.