I'd have to say the Sand Snakes and Doran Martell.
I think it's because they didn't feature in the books until AFFC and they haven't had enough interesting material for me to become emotionally invested in them.
Also, what characters are you indifferent towards in the sense that you don't hate or love them but you would probably care if something good or bad happened to them.
For me, it would be Jon Snow, Catelyn Stark and Stannis Baratheon.
I know they're characters that people usually either love or hate but I can't pick a side! I'd rather be neutral.
Edited by sightofthesun, 25 August 2013 - 08:07 AM.