I think it would be more politically correct to say you are not sexually attracted to fat chicks. To which that's your own preference, but to say you hate them makes it sound bad. But meh~
It's just for the sake of conversation.
Me saying that I don't like short people isn't as socially unacceptable to me saying that I don't like fat people.
I mean, not tehnically wrong, you can feel what you like, but i personally dislike that someone would hate an entire group of people, based on one characteristic.