Yes Man: 6 out of 10.
I think Jim Carrey is now making the same movie over and over again. They have these silly and simple premises, such as "Jim Carrey can't tell a lie" or "Jim Carrey says yes to everything", and then hilarity ensues.
Ok, it's not quite hilarity, but there is this guy:
That's Murray Hewitt from Flight of the Conchords, a character I just adore. In Yes Man, Murray Hewitt goes by the name Norman but it's pretty much the same character. It's also the funniest character in this thing. If you see it, see it for Murray.