Television would be dull if it was filled with do-gooder characters with no evil streak in them, so in order for drama to unfold there needs to be a clash between the protagonist and antagonist. These evil characters commonly have much more depth and are quite intriguing, and every so often you will find one that you love to hate. Sometimes you will feel sympathy for these characters, other times you’ll be jealous of their ability to be effortlessly cool and witty, and sometimes they’ll simply be so evil that it is as entertaining as it is shocking.
10. Dr. Romano
Most of the characters on ER are all likeable, but not Dr. Romano, who is the character that everybody loves to hate. A stereotypical surgeon, he is brash, arrogant, rude, snarky and narcissistic, but also very good at his job. This adds a different dimension to the show, and although never a main character, his appearances are always memorable, especially when the other cast members need someone to clash with. Although people love to hate him, the audience can’t help but feel sorry for him by the end, as he is the victim of two freak accidents, the second of which causes his death. Strangely enough, they both involve helicopters, with the first accident seeing him lose his arm to a rotor blade, and the second where a helicopter crash lands (somewhat cartoonishly) on top of him.https://nancyicurtis.wordpress.com/2015/09/03/a-definitive-ranking-of-the-main-doctors-and-nurses-from-e-r/ Source: Nancyicurtis.wordpress.com