I absolutely loved the "bizarre twist" at the end.  The dramatic change of tone (it got downright creepy) and very different combat tactics required really spiced things up just when the endless pirate henchmen were starting to seem a bit old (and it's not that I didn't enjoy the earlier parts; combat was consistently fun throughout the game).

Meh...

hmm, I just finished the single-player campaign for the first time -- I've never played any COD game before, and I just bought this because it was kinda cheap in the store.