I would clarify red colours on my list meant more negative feelings, not that I necessarily hated the character. Think of it as the ones that have dipped below indifference or a mild liking of them, some I did pretty much hate, but definitely not all.
Why do people not like Snow? You keep bitching about how whiny previous protagonists are, so they give you someone awesome like Snow and...you hate him?
As said, the hero nonsense makes him annoying, plus he is a lot of talk without any evidence to back it up early on. He is a bit of a fool. Now, I had negative feelings more generally for him, but I didn't exactly hate him. By the end of the game I was mostly fine with him since he didn't go on as much about being a hero, but what I liked was his story with Hope, not his story with Serah. In fact, while Hope wasn't the greatest character alone, his relationships with Snow and Lightning really worked well for me.
Barrett was badass.
A badass poses a calm, collected exterior and has a sense of danger without having to be showy for people to see it. Barrett throws tantrums regularly. He is someone to be afraid of and an ass, but he is out of control and needlessly violent.
Auron and Minwu are good examples of badasses in Final Fantasy. Minwu was so awesome they made every lead White Mage since him a beautiful woman.