From least to favorite:
FuSoya - We don't have much interactions with him
Tellah - He doesn't have enough MPs, and he's okay but not that great.
Yang - He's badass and he's great but I have to choose.
Edward - He's sweet, and I love his tragic story.
Rosa - She's very kind to everyone and very useful.
Porom - She's so cute and funny and brave.
Palom - Just like Porom, he's very cute, funny and brave, but I prefer him a little bit.
Cecil - One of my favorite FF main character. He's very brave and he's so sweet to everyone.
Edge - He's very badass and strong, and I also love his personality. He's very emotional, and it's quite different from many other characters.
Rydia - I just love her story arc so much, and I love the fact that she's a summoner and does black magic. I miss that in the other games.
Kain - My fave, he's just so badass, and so "human". It's easy to see ourself in him, at least a little. I really love his story arc too.