I'd be happy for any kind of One Piece game. However, I'd much prefer a game similar to Naruto Shippuuden: Ultimate Ninja Storm 2 from Luffy departing from his hometown up to the time-skip (would be one massive game) then a One Piece game similar to the Dynasty Warriors: Gundam / Fist of the North Star: Ken's Rage.
I enjoyed NS:UNS 2 a lot more then the latter ones though don't get me wrong. I still enjoyed the DW:G series and FNS quite a lot. Well DW:G 3 was quite disappointing since I actually found DW:G 2 better
. (Really where were my space battles? And I don't mean in silos, I mean floating in space like DW:G 2)
But seriously, the QTE battles in NS:UNS2 >>> almost everything in DW:G and FNS. The only thing that comes close are DW:G extra movies. Those QTE battles are a lust for the eye that shame even Naruto's anime. And if I could kick Crocodile in the air and finish him with a Gomu Gomu no Storm I'd be the happiest guy on the planet. Going gear second and do a Gomu Gomu no Jet Storm on Luci would be a close second.