Repetition in Gameplay.

While I am a person who loves a good game, there is just one thing that get's on my nerves, and that's when a video game just repeat's one thing over and over again. For example, both Call of Duty and Battle Field do the same thing when it comes to game play, which is to go from point A to point B, while shooting the enemy along the way. This can be expected from a first person shooter, but when you know what the enemy is gonna do, there is not much of a challenge (except for increasing the difficulty). What about the rest of you guy's? What type of repetition in a video game that get's on your nerves?