It hasn't done good to some guys playing the game as a female. They had to start a romance with Carth and hate him since then. :D
He didn't even bother me so much when I played female. Mostly because Anomen in Baldur's Gate II was FAR worse.
Still, Carth obviously added something to the game. You can still vote for him if you hate him, that's what the topic is about, but one person claimed he added nothing, which is false. Take a look at the opinions on Carth, people are divided on whether or not they love or hate Carth, but everyone reacts pretty strongly to him. That means he damn sure added something.