Only now did I realize there was no topic for this, which is surprising.
Anywho, I like this series overall, but my relationship to the series can basically be compared to Ross and Rachel in Friends.
It started great at first with CoD4, which I had heard great things of. At the time I hadn't played anything like that before, and it simply blew my mind away. I fell in love with both the campaign and the multiplayer and to date it still remains my favorite in the series.
So naturally I was highly anticipating Modern Warfare 2, which was one of the first games that I was really hyping up. It was overall a great game which I've sunk many hours into, but I couldn't help feeling disappointed with certain aspects of it. For instance how the campaign was filled with plot holes and tried to be as over the top as much as possible in contrast to CoD4 which was more sparingly in that regard. Also the multiplayer was completely unbalanced, but it was still really fun.
Then came Black Ops, which I recall everyone being stoked about how great that campaign was. I never got into it though, but luckily the multiplayer was pretty great and a lot more balanced than MW2. Also it was pretty cool that it was set in the Cold War.
However, it was at this time that I started to become tired of CoD, as I felt that the games felt stale and just the same every year. So I skipped both Modern Warfare 3 and Black Ops 2 at first, but still got them a few months later down the line out of curiosity. And I guess that's where I got into the series again.
Modern a Warfare 3 was, for me at least, a great ending to the trilogy and I felt that it ended on a satisfying note. I didn't play much of the multiplayer though, it seemed good but I was still a bit tired of the same old concept.
My feelings for Black Ops 2 was fairly similar, didn't play much of the multiplayer but the campaign was something else. Branching paths, more options for customizable load outs and tackling the missions and easily the best villain the series, made for the best campaign in the series since CoD4.
So now that I was back in the series, what could possibly go wrong? Well, they announced Ghosts which looked like a joke, especially in comparison to Battlefield 4 that was released the same year (albeit in a broken state). I did end up getting it still, but this was after Advanced Warfare. It wasn't bad, but it wasn't great either. The campaign threw so many ideas in but barely made anything with it, and any sense of logic was completely thrown out of the window. The multiplayer was still the same deal and didn't keep my attention at all.
Now is where things might get controversial, as we come to Advanced Warfare and... I actually really liked it. A lot. The campaign was fun, although the story was predictable and pretty much ripped off from Tom Clancy's Hawx. But the movement system and the added verticality was completely fresh, and it was something that I felt CoD needed after so many years and games that it needed some innovation. I didn't play much more of it though around the release of the first DLC, but not because I grew bored of it rather then new games coming up and my data capped internet not keeping up with these big updates.
So then came Black Ops 3, which I had really high hopes of considering how great Black Ops 2 was. Sadly, the campaign remains the worst in the series for me thanks to boring mission designs, lots and lots of cringeworthy lines (almost as cringeworthy as the Piraka Rap), and the true meaning of the story was hidden in such an obscure way that that is more mind blowing than the story itself. The multiplayer fared a lot better though, and while the movement system was scaled back a bit, it was still an enjoyable experience that ended up being the first game since the first Black Ops where I spent a lot of time throughout the year.
Now for Infinite Warfare, I haven't gotten it yet. I want to get it because the campaign seems really interesting and of course the remaster of my favourite entry in the series. I played both multiplayer betas, but I was not impressed at all which surprised me considering how much I liked the multiplayer in Black Ops 3. It was just way to chaotic for my taste.
So there's my long rambling on the series throughout the years. I've also played a few of the older ones. Call of Duty Classic was fun to play but it also hadn't aged well. Finest Hour was alright, but the lack of checkpoints and the inconsistent difficulty made it a furiating experience at times. Call of Duty 3 I think I got half way through before I stopped, partly because it was rather bland and felt a bit cheesy, partly because they didn't even bother with the PS3 version and partly because on Hardened difficulty it's quite infuriating.
So I've been a bit on and off with this series, but I'm hopeful for the future. Rumor has it the next game is going to be set in Vietnam, which I think could be pretty cool. I also hope that it's more barebones as far as perks, killstreaks and attachments go, like CoD4.
TL;DR My relationship with this series has been incredibly on and off, but I'm hopeful for the future.