I like McCoy. Corny and over the top sometimes,very. To me he makes most sense when interacting with Spock, when alone i didn't like him as much.
He balanced Spock out, I love the dialog between the 2. Even when Spock downright calls humans silly, they both still love each other. Like amok time when Spock invited him to the planet, and Bread and circuses when McCoy tries to thank Spock for saving his life in the arena. Sometimes I think their story is the main character of the show. Kirk is not as complex as Spock and McCoys relationship.