Dimnos gave me Christopher Walken
Christopher Walken movie I loved: The Dead Zone
He really sold me on the idea that he was a psychic that I couldn't entirely trust because he may or may not be crazy. I didn't even mind that he was a grown man named "Johnny".
Christopher Walken movie I liked: Balls of Fury
I liked him pretending to be Asian, plus there were a lot of great bits from minor and supporting characters.
Christopher Walken movie I don't like: Joe Dirt
Liked him as the former mafioso turned janitor via witness protection program, but everything else in this movie...
Honorable Mention: Sleepy Hollow
"I want Christopher Walken to play a scary villain in our movie, but I don't want him to talk."
"No problem. Just give him a weird haircut and shark teeth."