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.
“I try hard not to preach, but I get carried away, which is a mistake, but it's a risk worth running.”
“I became interested in making books, starting about 1965, when I did the Serial Project #1, deciding that I needed a small book to show how the work could be understood and how the system worked.”