[quote name='JStryke']I can't speak for Battlefield, but some FPS games do have short single player (the war based games being the bigger culprits from my experience). I actually am not the most fond of CoD multiplayer (Halo player myself), but the single player in the CoDs I have played are actually enjoyable, as short as they may be.
As far as them being alike, yes and no. Are they similar, I won't argue that, but they are somewhat different. Modern Warfare single player is kind of like a spread out story, and Black Ops actually took place in Vietnam (iirc). Are the objectives recycled but just under a different skin, sure, but it is what it is.
As for CoD multiplayer, as far as I can tell, aside from the maps, it does always feel the same.
For special ops, while you do have to go through the multiplayer menu (I think), it can be done solo.[/QUOTE]
To be completely honest, the last real FPS I've played were the original UT and Q3A. Thats what I cut my teeth on way back in the day and pretty much my basis for FPS now a days.
That being said, I finally got around to playing L4D1 and went thru the first campaign. Very much enjoyed that. Made the mistake on the rooftop of getting away from everyone and thinking "hey, perfect time to heal thy self". Wrong! I've had that, L4D2, the entire Half Life series, Killing Floor, Borderlands (vanilla version), among tons others that I've had on Steam for nearly 2 years now.