First off: I don't have Dissidia because I don't have a PSP and I don't care enough to get one due to having more than enough gaming systems already (Gamecube, PS2, DS, 360). And I hear they're easy as shit to break.
has Dissidia and showed me some bits and pieces of it. Namely, him constantly failing horribly at one of Cloud's levels, Squall shooting Sephiroth in the face during the opening (YESSSSS), and the conversation between Shiva and Firion. Having played FF2, I lol'd so damn hard at that part.
"Foe Yay" - Look it up on TVTropes.
The Emperor's sparkliness - Seriously, the dude's like the David Bowie of Final Fantasy. And thanks to the constant "FABULOUSSSS!" jokes the guys and I make, it's almost impossible to take him seriously anymore.
Squall - TVTropes lists him as a Team Mom in Dissidia, as he's apparently almost always babysitting Zidane and Bartz (who's actually older than Squall!).
Pedo!Kefka - ...yeah, I dunno. Kefka's easily my absolute favorite FF villain for good reason. His interactions with Terra in Dissidia from what I've seen can get a little creepy. But not as creepy as...
Sephiroth - In case you can't tell my stance on this guy, here it is: FUCK SEPHIROTH. Fuck him and his girly hair and his lack of a personality and his creepy-ass Oedipus Complex for something that's not even his real mom and his unholy emo clone spawn things from Advent Children. Fuck that noise. Seriously, try to imagine anyone else besides a rabid yaoi fangirl writing his dialogue with Cloud. IT'S IMPOSSIBLE.
Final Fantasy II, VI, VII, VIII (c) Square Enix