All the yellowface ones? :) I've just been watching the Mr. Moto collection, and while I think Peter Lorre was fantastic, they'd still have been better with an Asian actor in the role and especially with better writing for some of the other Asian characters. I loved Charlie Chan as a kid, and those movies are, if anything, much worse. It's a real pity so many interesting movies were ruined by racist casting and fortune cookie dialogue. They've got these hints of promise, but the sum total is... not so great.