Well, these are my opinions on the characters in FF IX now, since I've done XII. Gotta keep it fair :)
Zidane:- He's a happy chappy, don't you think? :D I can't believe he's only 16, though. But, even though he's a thief, he spends most of his time thinking about the good of other people. Which is good, I guess, since he's the one who pushes the merry band of FF9 to save the whole world and all. And even though he only likes Garnet because she's pretty at first, he does develop and mature and I think that they're a really great couple. And I love how his hair looks in the video. XD
Garnet Til Alexandros 17th:- Alright. Hands up who hates the clip she is always wearing? It's hideous. And why does she change it to a blue one for her coronation? It is still horrible!! But I like her. She's an actually strong female character, without being all cut off from the world and everything. Plus, she's one of the few characters in the FF series who is pretty normal. The rest of them are really brave, strong, rebellious, etc, but Garnet is a normal person who gets scared or sad or frustrated.
Steiner:- Yeah, he's a bit pompous, but don't forget that he works for the royal family. He's just funny to take the mick out of! And you can't doubt his loyalty. It's a bit annoying that he;s always shouting though. And the noise his armour makes gets a bit old very quickly. But it's also very funny that he's scared of Vivi, who is the sweetest scaredy cat ever.
Vivi:- Finally!!! I LOVE Vivi. Best Final Fantasy character EVER!!!!! He is soo cute! And his eyes are really cool. As is his hat. And his coat. Again, he is soo cute! Just in case I didn't get that point across the first time. :D I love him in videos, especially the ones right around fighting the Black Waltz 3 for the first time. When his hat flaps around and he looks all sad...Aww. Plus, since he's a black mage, he is pretty much a staple in all battles, seeing as he wields all the elements.
Freya:- Okay, rat people? Awesome. Plus Freya is a cool character in general. I love the way she fights. But it is a little frustrating that she goes away for ages and then she's really weak for such a long time. But once she's at an equal level again, I love her. Her javelins are seriously cool!
Quina Quen:- The he-she freak of Final Fantasy. Which is it, for God's sake? It's wearing pink, but I guess that really doesn't make that much sense...But his/her Eat and Cook abilities are pretty cool (a completionist's worst nightmare, obviously, but hey!) and I love the hat!
Eiko:- Okay, she is so NOT 6 years old, right? But still. She's loud and obnoxious and ever so slightly arrogant. Just the sort of person that if I met her in real life I wouldn't be able to like. Wahey. She annoys me, but she does get a lot more mature over the game and then she is a lot less annoying. Especially once she gives up on Zidane. But she is cool in the film clip with her and Garnet when they summon Alexander.
Amarant:- Moody, miserable and full of himself. A classic character. His hair is cool, but his beard is so not! Although, the idea of him fighting with his claws is unbelievably awesome!!! It does annoy me a lot, though, how when you first get him he has got NO abilities, so he gets lumbered with ancient equiptment for a long time just to learn his abilities!