Unpopular opinion: I didn't like Caroline Forbes at all.

In the early seasons, she often felt insecure and jealous especially when she compared herself to Elena. She always tried to control the people and events around her. She often made snap judgments about her friends. I didn't like her relationship with Stefan because I found it forced and it lacked chemistry, even in the later part of the show. In Caroline's entire storyline, the only thing I liked was her relationship with Niklaus and even that was abandoned too abruptly.