One unexpected thing about actors is their hidden talents. Often they never get to show them. When they do, it can be memorable.
Mads Mikkelsen is a prime example. He is a terrific actor. He has played villains -- Le Chiffre in Casino Royale (2006) and Hannibal Lecter in the television series. He was formidable in Unit 1, the excellent Danish television series. He won Best Actor at Cannes for his performance in The Hunt (2012).