Probably Call of Duty. It really is an overrated series, to me, and gets old rather quickly. I can't place my finger exactly on why it's like that way, but I know for sure that there are better shooters out there. CoD seems overhyped quite a bit with the selfsame elements that, to my knowledge, it's consisted of since the first game. I've only played Black Ops and Modern Warfare 2 (the latter being more fun by far), so in reality my experience is very limited, but I still prefer many games over this franchise.