I don't keep a record of the parts I've played, and I don't compare characters, but maybe I should? I could construct a graphic that grades badness and madness levels? Interesting idea.
I was watching the last season of 'Mad Men,' and they're now so in their characters and they're so comfortable in their characters, and they're doing such good work. That can only happen from doing it over and over, and developing a character over seven years.
The acting in 'Downton Abbey' has been consistently excellent across the board.