I never read the books, but I am a fiend for spoilers, and I can say, as a show-only viewer, Robb is not one of the characters I really root for.  I mean, I like him and the Starks and what they stand for to a certain degree, but very little has been done to make him a character worth caring about.  In fact, he is…

I haven't read the books, and without reading these comments, I would have no idea this character had any real significance.  In fact, his screen time has been so minimal, I don't think most people would even realize it is the same character that appeared earlier.

I am a (marginally educated) newb.  I have not read the books, but I can't resist reading these comments and looking for spoilers.