All actors have a particular role that they’re best suited to play, and when they play those roles, they really connect with the audience.
For example: John Travolta is amazing at playing The Loveable Loser. That’s who he was in Welcome Back Kotter, Grease, and Saturday Night Fever, and audiences freaking LOVED him. When the studios tried to make him The Leading Man, in films like Urban Cowboy, Perfect, and something else I’m forgetting right now, audiences turned on him and his career started to flounder.
He didn’t do much of note for a very long time, until Tarantino cast him as a junkie hit man in Pulp Fiction. Suddenly, he’s playing the Loveable Loser again, and his career explodes with roles in Michael, and something else that I’m forgetting right now (it’s 5am and I’m on 4 hours of sleep).
So, when he’s playing that archetype, audiences connect with him on a subconscious level, because it’s the type he plays so perfectly.
The type I play so perfectly, it turns out, is that guy you love to hate, that guy who antagonizes your hero. That’s who I played in The Guild, Leverage, Eureka, and Big Bang Theory. I don’t know why I play those roles so effectively (it may be related to how much I like to sass people in real life), but it’s what I’ve been doing for a few years, and it’s no coincidence that my acting career has had a bit of a resurgence as a result.
I don’t consider it typecasting, I consider it smart casting, and I wish that more casting people would understand what type I play, and give me a chance to work in those roles.
Oh, and remember: the villain is the hero of his own story, so even though I’m playing an asshole you love to hate, from that character’s point of view, he isn’t doing anything wrong. For example, Doctor Parrish on Eureka was an antagonist to Fargo and Carter, but from Parrish’s point of view, he was the smartest guy in the room, and he was just baffled that he was the only one who could see it. As a result, he resented having to answer to Fargo, who he viewed as someone who didn’t deserve to go to Titan, be the Director of GD, or get the girl. He resented having to deal with Carter, who wasn’t even a scientist, but was always telling him what to do. At the end of the day, though, Parrish loved GD, loved the town, and would tolerate working with people he thought weren’t as smart as him, because he believed in doing the right thing for science.
Thanks for your question.