I pretty much roll with Team Unpopular in FFXIII.
Snow, Hope and Vanille were my favorite characters. Snow's and Hope's arc is the highlight of the game for me, even after a second playthrough.

I seem to recall a lot of dislike for Tellah back in the day... I have no idea why buthe was my favorite IV character.

Rinoa is a good character. One of the best designs in the series, she's trying to do something noble and she has some interesting development that, much like all of FFVIII, was underdone and failed to be completed properly. But still, I like her for what they managed with her. I don't think she was that annoying or that she was just aiding the Forest Owls as a sort of "smurf you, dad." She's spoiled but not a spoiled brat, I guess I'd say.

Amarant has a nice design, a cool theme and a frickin' AWESOME moveset. His character needed some work but the essentials there are just fine.