I feel the same. The humor in the prequels felt forced and cheap, whereas the humor in the OT - except for the childish nonsense in Jedi - really added to the characters. C-3P0 doesn't realize how annoying he can be, especially with Han and especially in dangerous situations. Really makes you feel for Han sometimes having to deal with him. He's a character that was funny right from the start and his annoyingness was amplified by Han because no one else really responded to him in such a way.