To me, every CoD Game after Cod 4 is shit. Within MW 1 they began to make some supercool superspecial high technological warfare crap out of the games, because they needed any kind of innovation. To me it is totally bullshit.
And I used to love Cod2 and 4. Such good, simple shooters back then with less of supercool specials.
And I hate future-games with that robot stuff. Seriously, this is not atmospheric at all. I always want to have and deal with real weapons. Amazing how the CoD developers manage to make every game worse than the other. But idc, after CoD 4, CoD died for me.
Determing the SP campaign. They are usually cool, that's true. But look at the length of the CoD 2 campaign, which probably was less awesome in terms of scripted specials and effects, but was pretty long and I loved it. But those campaigns got shorter and shorter by time. Awesome for sure, but no need to play them again.