Just beat Crisis Core. It's obviously far from perfect, and the battle system wasn't really my thing (I prefer the oldschool ATB system, and I got by by doing nothing but Thundaga), but I still enjoyed it, which is surprising, considering the number of things that could have gone wrong with a FFVII prequel.
I had no fucking clue what Genesis's goal the entire game was, but I liked the story, and the ending was certainly a tearjerker. It makes sense to me why Cloud is such an emo fuck.
I'm playing through Dissidia right now; it's just one big goodie bag of nostalgia, and that's certainly my kind of thing. Besides, you get to kick ass as Kefka and the FFII Emperor, though I hope there's a sequel with a better selection of characters.
Example: why the fuck would they choose Tidus over Auron, Yuna, Wakka, Lulu...? Hell, everyone in X was awesome besides the annoying fuck they chose (Jecht's cool, though.)
I love Bartz and Zidane, but they're a bit too similiar - I'd replace either Bartz with Faris or Galuf, or Zidane with Vivi
Garland, Golbez and Exdeath are also too similiar - big, bad, armored villains, even though I like them all (except Exdeath) in their respective games