Yuna (In X-2 and X)
(Yes I loved X-2) Because, I dunno. She was a really friendly skitzo, and I like those kinda people I guess, and in real life too.
Sorry I had to create an extra paragraph
Yuffie is close cause, well she steals your materia. And Zack is close cause, well he's basically the only main character in CC, and you watch him die, that makes him good :P! No it's more complicated, and its too long. I love tidus is well especially at the end, it's just he's irritating at the start. but grows on me least.
I generally love all the female characters more in FF. Rydia, Celes, Aerith, Rinoa, Selphie, Garnet, Eiko, Rikku, Vanille, Fang, Lightning etc. probably, unless Quina counts as female, then she is not on that list.