The veteran actress, 83, was speaking in the BBC1 documentary Fern Britton Meets... about her time on the soap and how she would have preferred to have appeared in other projects.
She said: "You may think I'm successful, but I don't. This will sound dreadful, but I didn't want to end my life playing a soap character. I wanted to end up playing wonderful characters like Dame Judi Dench.
"There are no longer any parts I want to play. I'm too old to play parts that are interesting. Just what comes along, I think."
Referring to a controversial storyline ten years ago regarding euthanasia, Brown also revealed that fans had told her they had also helped loved ones commit suicide.
She said: "I had so many letters from people saying they had never told anybody they had been asked to do it, and actually had done it."