Cabaret
I know he's played Emcee in Cabaret more or less forever, but it was still a privilege to see him in the role during our trip to New York recently.
No matter how many times he's done it, he clearly hasn't lost his appetite for the role. Absolutely magnetic. He's on show almost all the way through and, even when he's on the sidelines, you have to keep watching him, sometimes at the expense of what's going on onstage.
Now I've got to try to find the 1993 version with Alan and Jane Horrocks as Sally.