As Frank White in King of New York, Walken commits ultra-violent acts with incredible panache and style (as he does in all of his collaborations with director Abel Ferrara), such as when inviting the guys back to his hotel while shooting bullets into a corpse.Andrew Paul Wood pays tribute to the greatness of Christopher Walken ("I can’t help it, I love Christopher Walken").
One thing to add. Years ago, there was a Walken profile in, I think, The Face. A source was talking about Walken's guest appearance on Saturday Night Live. As I remember the anecdote, Walken spent all day sitting with the writers, but not saying a thing, not laughing at their jokes. At the end of the day, he says: "You know what's funny? Bear suits are funny."