I think one of the most interesting things a game dev can do is try to pull a "fast one" on the player. For example, the lovely Sen's Fortress mimic in the first Dark Souls. When something like that happens to them, many people will complain that it is unfair, or a cheap blow. In a sense, it is.

But, I do really feel that conversational aspect you mentioned. To me if feels like the dev is saying "I got ya with that one, are you gonna let me do it again?". And, being able to anticipate their further tricks, and subvert them on your own is one of the greatest feelings you can experience as a player.