I believe I have found what appears to be a inspiration for yes man.

The robot GERTY from the movie Moon.

Gerty is a robot who often says ''I am only here to help''

Yes man says he was programmed to be as helpful as possible


Gerty has a television with smiley face on it for a face

As does Yes Man


Gerty goes against his true owners wants to be helpful to a character

Yes man does this also

Huh. Could be... the movie's pretty recent, and they've been working on the game a while.

I love that movie. So awesome on so many levels.

I was always thinking it was from the resent film called "Yes Man" Meh.