I've been a huuuuge CoD fan ever since the first came out for PC years and years ago.. I've beaten every single CoD game ever made, on Veteran difficulty, apart from CoD5. Mostly because once Resident Evil 5 and Fallout 3 got released, those took up most of my time
I plan on beating CoD5 soon, I just am in the midst of playing Gears of War 2 again.
I found that CoD 3/5, being developed by Treyarch sucked. Infinity Ward is where it's at in terms of the CoD series. There's somethingabout the way Treyarch developed those 2 games that just didn't have the same vibe as the rest.
The online play for CoD3 sucked really bad, but the campaign was okay.
I don't really care much for CoD5 multiplayer either, but again, the campaign is okay.