[Shaun]

I don't mean worst in terms of how poorly conceived they are on the author's part, but what they represent and people who just rile you up. *cue a tirade of Harry Potter/Twilight characters*

For me it's torn between Jack from Lord of the Flies, Mr. Wilcox in Howards End and Dim in A Clockwork Orange. I guess Dorian Gray is a pretty bad character too, but it makes too interesting a read for me to hate him.