Omg awesome costumes listed so far!
I know for sure I'm bringing SEYMOUR (FFX) and more than likely JOTE (FFXII).
I have several others that I may entertain the ideas of bringing like AL-CID (FFXII), TOMAJ (FFXII/FFXII:RW), KUJA (FFIX) and SQUALL (FFD).
I'm not postive on those though. But definately Seymour and Jote! XD