FFXIII's
characters weren't bad. Sahz was great, Hope was alright after he stopped being annoying/whiny in the first 10 hours, Fang was solid, Snow was cheezy but fun, and Vanille...well it's always good to have a character with down syndrome in your game that you can laugh at. BUT LIGHTNING ARGHGHGHG; in an attempt to make a female Cloud, they basically make the most uninteresting no-emotion boring lead in an FF to date. She sucked in XIII, and I didn't play enough to see if she was any better in XIII-2, but I doubt it. She's just a terrible attempt at a character and made the XIII franchise a giant waste.
FFXV looks totally uninteresting. They all have been The Spirits Within: The Game ever since FFX.
I don't see how anyone can take a glance at the trailer and think of the words 'Final Fantasy'.

XII was awesome until it falls apart; XI/XII/XIII/XIV/XV all have looked like "FF"; What, you don't want cutscenes in your rpgs? Play XI/XIV then. XV probably looks the least FF because it was originally supposed to be a spinoff. To me FFXV looks like Kingdom Hearts grown up and without the Disney.