Well, at this point, Caroline is the only non-hybrid vampire man character who still haven't turned off her humanity. So it should be interesting to see. Whether that'll be a good storyline is hard to tell. I think at this point the only way she'll turn it off is if her mother dies, which I hope never happens, or an Original compells her to turn it off. If that happens, I hope no-humanity Caroline will be different from no-humanity Elena, there's no point to play the same storyline twice.