Several years ago, I had the chance to direct Bryan Cranston. My partner and I were showrunners on a Nick-at-Nite animated show called Glenn Martin DDS, and even though Bryan was currently shooting Breaking Bad, he came to voice a character.
Bryan spent a few hours with me in the recording studio and he was an absolute pleasure to work with. He was courteous, professional, fun, and very easy to direct. He was so good, that we wound up casting him as the lead in a different animated pilot we were working on.
After the record session, I thanked Bryan for lending us his time and talent, and he said something that took me completely by surprise, and has stuck with me ever since.