Yea I really hated Korra at first, but she ended up growing on me. She went from being the self claimed "unbeatable Avatar" to learning to accepting aid and help.
I found the love triangle really confusing, but yea that ending though
I really wished they kissed because as official the animators said the pairing was, some people weren't convinced.
Omg Toph didn't change at all xD her personality was exactly the same. I find it funny that she was so mature in front of her daughters but in front of Korra she was acting like her younger self.