If I'm really pushed, I know I'll get flamed and insta-banned...*sniff*...but the
-->CALL OF DUTY <-- series after CoD 2. I don't count MW and MW2 into the CoD series, not after IW tried to remove the 'Call of Duty' from MW2s title.
So evaluating the sequels from the amazing game that was CoD 2 -
BR1 (don't get me started on this)
Cod 3 (good story, terrible multiplayer and a major infestation of the goddamn QTEs)
CoD 5 (boring campaign, didn't feel for anyone except that bit when Polonski blew up, multiplayer was average, but dogs killed it and Zombies was the only redeeming feature. EXCEPT the zombie map packs came one pert undead fashists to 3 parts mediocrity)
Cod Black Ops (Multiplayer drags itself from the dirt, for me [almost] a shining paragon of what to do right [except for the GODDAMN DOGS], Campaign gave me a head ache and the death of that certain someone who we knew and loved from WaW didn't make me want to kill the big bad like the death of Ghost in MW2, it just made me kinda sad, bordering on apathetic. Zombies is a blast again, but sadly it has been made VERY hard, in a duo I'm lucky if I can get to round 14. You should be able to make it 'easy' throuh a check option so you can just have fun reveling in your own awesome-ness and not worry too much about the zombies owning you and your effort to reach the current wave being wasted.)
There, Flame me at will.