Forum:Best Call of Duty campaign?

I feel the need to define best, which is an approximate term in the sense that each person has a differing definition of what may or may not be best considering their views of the Call of Duty franchise, what they may or may not consider to be "cool" or so forth, and continuing nuances. However, I think that interpretation is best left to the individual, which is the same reason I have asked which Call of Duty campaign and story is the best and not outright stated Black Ops 2 or the original Modern Warfare and so on and so forth. For those curious, I will leave my opinions below. You are, of course, free to skip my rambling and simply answer the question immediately. I am hoping that you'll provide a reason, such as "it was intriguing" rather than commenting on the amount of badassery depicted without referencing specific incidents or, worse, simply dropping a name.

Personally, my opinion stands that the Black Ops II campaign was the most intriguing for me in terms of "I need to read more about this because I find it fascinating as a concept" but the Modern Warfare series also enraptured me for its bombastic action sequences and continuous refusal to let go of your damn neck and stop speeding up your heart; if I was to see either of these storylines turned into a film, I'd honestly rather see Black Ops' storyline take the Hollywood plunge, as I think it has more to offer with its psychological undertones and intriguing antagonists. I will digress my lack of having seen the Advanced Warfare story the whole way through yet; since I am a Kevin Spacey fanboy, that one may just win me over compared to the aforementioned titles.

If you want to take it a step further, tell me your favorite Call of Duty antagonist and protagonist (hero and villain, for you not as well-versed in literature as I), or maybe your favorite story arc. Favorite weapons, ships, aircraft, missions and so forth will also suffice. Thank you for your time and for fulfilling my curiosity. (Oh, and as an afterthought, I'm very curious what you all find to be the most morbid or terrifying thing ever to wander over to Call of Duty; while some might find this statement appalling or insulting to real life people of similar status, the post-injury appearance of Josefina Menendez traumatized me for a while, as well as the slaughter of innocent civilians by DeFalco in Black Ops II and similar actions by Menendez' drones in Los Angeles. While these elements did, in their own way, enhance the depth and magnitude of the story, they also unsettled me. Is there anything in the Call of Duty series that unsettles you?)