Which FPS series has the best single player campaign?

[TruckOSaurus]

ithis said:

TruckOSaurus said:

ithis said:

Later edit:
Freekin specify the era if your thread title is explicit enough to answer directly damn it.

I'm one of those crazy guys who still believes in reading the OP, so no.

I believe in correct wording, so I still believe you shoud.

I won't. I'm perfectly fine with the current wording.