When actors get pigeonholed, that's their own doing to a large degree. Because if you do something that people like, obviously they're going to ask you to do it again. It's up to you to say no. If you're that insecure about working, you'll probably do what you're known to do.
“Yeah, it's funny, working on a show with as large a cast as we have here, your work gets sort of compartmentalized. There's still about half the cast that I've never had a scene with but I have missed working with Terry.”